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pebble |
Noun
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a small smooth rounded rock |
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peneplain |
Noun
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a more or less level land surface representing an advanced stage of erosion undisturbed by crustal movements |
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peneplane |
Noun
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a more or less level land surface representing an advanced stage of erosion undisturbed by crustal movements |
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peninsula |
Noun
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a large mass of land projecting into a body of water |
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permafrost |
Noun
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ground that is permanently frozen |
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petrifaction |
Noun
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a rock created by petrifaction |
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petrifaction |
Noun
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the process of turning some plant material into stone by infiltration with water carrying mineral particles without changing the original shape |
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photoelectron |
Noun
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an electron that is emitted from an atom or molecule by an incident photon |
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photon |
Noun
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a quantum of electromagnetic radiation |
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photosphere |
Noun
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the intensely luminous outer surface of a star, usually referring to the sun |
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piedmont |
Noun
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a gentle slope leading from the base of a mountain to a region of flat land |
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pinetum |
Noun
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an area planted with pine trees or related conifers |
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polar glacier |
Noun
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a glacier near the Arctic or Antarctic poles |
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pole star |
Noun
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the brightest star in Ursa Minor |
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polar star |
Noun
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the brightest star in Ursa Minor |
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polestar |
Noun
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the brightest star in Ursa Minor |
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polder |
Noun
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low-lying land that has been reclaimed and is protected by dikes (especially in the Netherlands) |
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polynya |
Noun
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a stretch of open water surrounded by ice (especially in Arctic seas) |
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pond |
Noun
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a small lake |
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positron |
Noun
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an elementary particle with positive charge |
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pothole |
Noun
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a pit or hole produced by wear or weathering (especially in a road surface) |
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precipice |
Noun
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a very steep cliff |
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prion |
Noun
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(microbiology) an infectious protein particle similar to a virus but lacking nucleic acid |
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promontory |
Noun
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a natural elevation (especially a rocky one that juts out into the sea) |
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protein molecule |
Noun
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any large molecule containing chains of amino acids linked by peptide bonds |
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proton |
Noun
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a stable particle with positive charge equal to the negative charge of an electron |
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ptyalith |
Noun
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calculus in a salivary gland |
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pulsar |
Noun
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a degenerate neutron star |
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plateau |
Noun
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a relatively flat highland |
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prime mover |
Noun
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an agent that is the cause of all things but does not itself have a cause |
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primum mobile |
Noun
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an agent that is the cause of all things but does not itself have a cause |
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phoenix |
Noun
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a large monocotyledonous genus of pinnate-leaved palms found in Asia and Africa |
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phoenix |
Noun
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a legendary Arabian bird said to periodically burn itself to death and emerge from the ashes as a new phoenix |
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peri |
Noun
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(Persian folklore) a supernatural being descended from fallen angels and excluded from paradise until penance is done |
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peri |
Noun
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a beautiful and graceful girl |
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pixie |
Noun
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(folklore) fairies that are somewhat mischievous |
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pixie |
Noun
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creeping evergreen shrub having narrow overlapping leaves and early white star-shaped flowers |
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pixy |
Noun
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fairies that are somewhat mischievous |
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pixy |
Noun
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creeping evergreen shrub having narrow overlapping leaves and early white star-shaped flowers |
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poltergeist |
Noun
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a ghost that announces its presence with rapping and the creation of disorder |
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person of color |
Noun
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(formal) any non-European non-white person |
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person of colour |
Noun
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(formal) any non-European non-white person |
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protector |
Noun
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a person who cares for persons or property |
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Peter Pan |
Noun
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a boyish or immature man |
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panegyrist |
Noun
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an orator who delivers eulogies or panegyrics |
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peer |
Noun
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a person who is of equal standing with another in a group |
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peer |
Noun
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a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage |
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peer |
Verb
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look searchingly |
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perceiver |
Noun
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a person who becomes aware (of things or events) through the senses |
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preteenager |
Noun
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a preadolescent boy or girl (usually between 9 and 12 years of age) |