reproductive organ of angiosperm plants especially one having showy or colorful parts
bloom
Noun
the organic process of bearing flowers
bloom
Noun
a rosy color (especially in the cheeks) taken as a sign of good health
bloom
Noun
the best time of youth
beam of light
Noun
a column of light (as from a beacon)
beta radiation
Noun
radiation of beta particles during radioactive decay
beta ray
Noun
radiation of beta particles during radioactive decay
beta rhythm
Noun
the normal brainwave in the encephalogram of a person who is awake and alert
beta wave
Noun
the normal brainwave in the encephalogram of a person who is awake and alert
binding energy
Noun
the energy required to separate particles from a molecule or atom or nucleus
bioelectricity
Noun
electric phenomena in animals or plants
bise
Noun
a dry cold north wind in southeastern France
bize
Noun
a dry cold north wind in southeastern France
black-body radiation
Noun
the electromagnetic radiation that would be radiated from an ideal black body
blackbody radiation
Noun
the electromagnetic radiation that would be radiated from an ideal black body
blood pressure
Noun
the pressure of the circulating blood against the walls of the blood vessels
boundary layer
Noun
the layer of slower flow of a fluid past a surface
brain wave
Noun
(neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
brush discharge
Noun
discharge between electrodes creating visible streamers of ionized particles
ballistic trajectory
Noun
the trajectory of an object in free flight
bolide
Noun
an especially luminous meteor, sometimes exploding
barometric pressure
Noun
atmospheric pressure as indicated by a barometer
brain death
Noun
death when respiration and other reflexes are absent
blue jet
Noun
atmospheric discharges (lasting 10 msec) bursting from the tops of giant storm clouds in blue cones that widen as they flash upward
boreas
Noun
a wind that blows from the north
bioluminescence
Noun
luminescence produced by physiological processes (as in the firefly)
birefringence
Noun
splitting a ray into two parallel rays polarized perpendicularly
bog moss
Noun
any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat
bolt of lightning
Noun
a discharge of lightning accompanied by thunder
basidiocarp
Noun
the fruiting body of a basidiomycete which bears its spores on special cells
bryophyte
Noun
any of numerous plants of the division Bryophyta
breaking point
Noun
the degree of tension or stress at which something breaks
breaking point
Noun
(psychology) stress at which a person breaks down or a situation becomes crucial
burrawong
Noun
large attractive palmlike evergreen cycad of New South Wales
bull pine
Noun
common and widely distributed tall timber pine of western North America having dark green needles in bunches of 2 to 5 and thick bark with dark brown plates when mature
basidiospore
Noun
a sexually produced fungal spore borne on a basidium
bishop pine
Noun
two-needled or three-needled pinon mostly of northwestern California coast
bishop's pine
Noun
two-needled or three-needled pinon mostly of northwestern California coast
black pine
Noun
large two-needled timber pine of southeastern Europe
black pine
Noun
tall symmetrical pine of western North America having long blue-green needles in bunches of 3 and elongated cones on spreading somewhat pendulous branches
black pine
Noun
large Japanese ornamental having long needles in bunches of 2
black pine
Noun
New Zealand conifer used for lumber
black pine
Noun
conifer of Australia and New Zealand
black spruce
Noun
small spruce of boggy areas of northeastern North America having spreading branches with dense foliage
black larch
Noun
medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark
black cypress pine
Noun
Australian tree with small flattened scales as leaves and numerous dark brown seed