an annual formation of wood in plants as they grow
gamma radiation
Noun
electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
gamma ray
Noun
electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
gaslight
Noun
light yielded by the combustion of illuminating gas
good fortune
Noun
a stroke of luck
good fortune
Noun
an auspicious state resulting from favorable outcomes
gravity-assist
Noun
(spaceflight) a trajectory that passes close to a planetary body in order to gain energy from its gravitational field
geothermal energy
Noun
energy derived from the heat in the interior of the earth
gas pressure
Noun
the pressure exerted by a gas
gangrene
Noun
the localized death of living cells (as from infection or the interruption of blood supply)
gangrene
Noun
necrotic tissue
gangrene
Verb
undergo necrosis
ground wave
Noun
a radio wave propagated on or near the earth's surface
gravitational field
Noun
a field of force surrounding a body of finite mass
gravitational attraction
Noun
(physics) the force of attraction between all masses in the universe
gravitational force
Noun
(physics) the force of attraction between all masses in the universe
gun smoke
Noun
smoke created by the firing of guns
gust
Noun
a strong current of air
gravitational interaction
Noun
a weak interaction between particles that results from their mass
geocentric parallax
Noun
the parallax of a celestial body using two points on the surface of the earth as the earth rotates
greening
Noun
the phenomenon of vitality and freshness being restored
group Pteridospermae
Noun
used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales
gymnosperm
Noun
plants of the class Gymnospermae having seeds not enclosed in an ovary
group Pteridospermaphyta
Noun
used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales
gnetum
Noun
small tropical tree with tiered branches and divaricate branchlets having broad glossy dark green leaves
gleba
Noun
fleshy spore-bearing inner mass of e.g. a puffball or stinkhorn
gymnosperm family
Noun
a family of gymnosperms
gymnosperm genus
Noun
a genus of gymnosperms
golden larch
Noun
Chinese deciduous conifer resembling a larch with golden yellow leaves
green douglas fir
Noun
lofty douglas fir of northwestern North America having short needles and egg-shaped cones
giant fir
Noun
lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves
grand fir
Noun
lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves
gowen cypress
Noun
small sometimes shrubby tree native to California
ground cedar
Noun
a procumbent variety of the common juniper
ground cedar
Noun
a variety of club moss
giant sequoia
Noun
extremely lofty evergreen of southern end of western foothills of Sierra Nevada in California
gymnospermous yellowwood
Noun
any of various gymnospermous trees having yellow wood
gametophyte
Noun
the gamete-bearing individual or phase in the life cycle of a plant having alternation of generations
gynostegium
Noun
the crown of the stamen in plants of the genus Asclepias
gynobase
Noun
the enlarged receptacle in which the pistil is borne
gynophore
Noun
the stalk of a pistil that raises it above the receptacle
ginkgo family
Noun
constituting the order Ginkgoales
ginkgo
Noun
deciduous dioecious Chinese tree having fan-shaped leaves and fleshy yellow seeds
gingko
Noun
deciduous dioecious Chinese tree having fan-shaped leaves and fleshy yellow seeds
germ pore
Noun
a pore in the outer wall of a spore or pollen grain through which the germ tube or pollen tube makes its exit on germination
germ tube
Noun
(botany) a slender tubular outgrowth from a spore in germination
gemma
Noun
small asexual reproductive structure in e.g. liverworts and mosses that detaches from the parent and develops into a new individual
galbulus
Noun
the seed-producing cone of a cypress tree
great-leaved macrophylla
Noun
large deciduous shrub or tree of southeastern United States having huge leaves in dense false whorls and large creamy flowers tinged purple toward the base