an artificial taxonomic category established on the basis of morphological resemblance for organisms of obscure true relationships especially fossil forms
form genus
Noun
(biology) an artificial taxonomic category for organisms of which the true relationships are obscure
filovirus
Noun
animal viruses belonging to the family Filoviridae
flavivirus
Noun
animal viruses belonging to the family Flaviviridae
foram
Noun
marine microorganism having a calcareous shell with openings where pseudopods protrude
foraminifer
Noun
marine microorganism having a calcareous shell with openings where pseudopods protrude
flagellate protozoan
Noun
a usually nonphotosynthetic free-living protozoan with whiplike appendages
flagellated protozoan
Noun
a usually nonphotosynthetic free-living protozoan with whiplike appendages
fish family
Noun
any of various families of fish
fish genus
Noun
any of various genus of fish
fucoid
Noun
any of various algae of the family Fucaceae
fucoid
Noun
a fossilized cast or impression of algae of the order Fucales
fucoid algae
Noun
any of various algae of the family Fucaceae
fucus
Noun
any member of the genus Fucus
fang
Noun
hollow or grooved tooth of a venomous snake
fang
Noun
canine tooth of a carnivorous animal
fang
Noun
an appendage of insects that is capable of injecting venom
flagellum
Noun
a lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa)
flagellum
Noun
a whip used to inflict punishment (often used for pedantic humor)
flame cell
Noun
organ of excretion in flatworms
fertilized egg
Noun
an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
flashlight fish
Noun
fish having a luminous organ beneath eye
flashlight fish
Noun
fish of deep dark waters having a light organ below each eye
fetus
Noun
an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal
foetus
Noun
an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal
flagfish
Noun
a fish with a dark-blue back and whitish sides with red stripes
fox shark
Noun
large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed
fledgeling
Adjective
of a young bird, having acquired its flight feathers
fledgeling
Noun
young bird that has just fledged or become capable of flying
fledgeling
Noun
any new participant in some activity
fighting cock
Noun
a cock bred and trained for fighting
flightless bird
Noun
flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches
flying bird
Noun
birds having keeled breastbones for attachment of flight muscles
field sparrow
Noun
common North American finch of brushy pasturelands
finch
Noun
any of numerous small songbirds with short stout bills adapted for crushing seeds
firebird
Noun
tropical American flycatcher found as far north as southern Texas and Arizona
firebird
Noun
eastern subspecies of northern oriole
firebird
Noun
the male is bright red with black wings and tail
fieldfare
Noun
medium-sized Eurasian thrush seen chiefly in winter
flycatcher
Noun
large American birds that characteristically catch insects on the wing
flycatcher
Noun
any of a large group of small songbirds that feed on insects taken on the wing
fig-bird
Noun
greenish-yellow Australian oriole feeding chiefly on figs and other fruits
flycatching warbler
Noun
any of numerous American wood warblers that feed on insects caught on the wing
falcon
Noun
diurnal birds of prey having long pointed powerful wings adapted for swift flight
falcon
Verb
hunt with falcons
falcon-gentle
Noun
female falcon especially a female peregrine falcon
falcon-gentil
Noun
female falcon especially a female peregrine falcon
fairy bluebird
Noun
fruit-eating mostly brilliant blue songbird of the East Indies