the mistake of not following suit when able to do so
renege
Verb
fail to fulfill a promise or obligation
ruff
Noun
(card games) the act of taking a trick with a trump when unable to follow suit
ruff
Noun
common Eurasian sandpiper
ruff
Noun
a high tight collar
ruff
Noun
an external body part consisting of feathers or hair about the neck of a bird or other animal
ruff
Verb
play a trump
range animal
Noun
any animal that lives and grazes in the grassy open land of western North America (especially horses, cattle, sheep)
ring rot bacteria
Noun
causes brown rot in tomatoes and potatoes and tobacco etc
retrovirus
Noun
any of a group of viruses that contain two single-strand linear RNA molecules per virion and reverse transcriptase (RNA to DNA)
respiratory syncytial virus
Noun
a paramyxovirus that forms syncytia in tissue culture and that is responsible for severe respiratory diseases such as bronchiolitis and bronchial pneumonia (especially in children)
rhinovirus
Noun
any of a group of picornaviruses that are responsible for many upper respiratory infections
ratbite fever bacterium
Noun
a bacterium causing ratbite fever
rhabdovirus
Noun
any of a group of arboviruses including those causing rabies
reovirus
Noun
any of a group of non-arboviruses including the rotavirus causing infant enteritis
rotavirus
Noun
the reovirus causing infant enteritis
rickettsia
Noun
any of a group of very small rod-shaped bacteria that live in biting arthropods (as ticks and mites) and cause disease in vertebrate hosts
radiolarian
Noun
protozoa with amoeba-like bodies and radiating filamentous pseudopods
rhizopod
Noun
protozoa characterized by a pseudopod
rhizopodan
Noun
protozoa characterized by a pseudopod
rod
Noun
any rod-shaped bacterium
rod
Noun
a gangster's pistol
rod
Noun
a long thin implement made of metal or wood
rod
Noun
a visual receptor cell that is sensitive to dim light
rod
Noun
a square rod of land
rod
Noun
a linear measure of 16.5 feet
red laver
Noun
edible red seaweeds
roach
Noun
European freshwater food fish having a greenish back
roach
Noun
any of numerous chiefly nocturnal insects
roach
Noun
street names for flunitrazepan
roach
Noun
the butt of a marijuana cigarette
roach
Noun
a roll of hair brushed back from the forehead
roach
Verb
cut the mane off (a horse)
roach
Verb
comb (hair) into a roach
rudd
Noun
European freshwater fish resembling the roach
rockweed
Noun
coarse brown seaweed growing on rocks exposed at low tide
red algae
Noun
marine algae in which the chlorophyll is masked by a red or purplish pigment
rainbow fish
Noun
small freshwater fish of South America and the West Indies
reef squirrelfish
Noun
on reefs from Bermuda and Florida to northern South America
redhorse
Noun
North American sucker with reddish fins
redhorse sucker
Noun
North American sucker with reddish fins
roe
Noun
the eggs or egg-laden ovary of a fish
roe
Noun
the egg mass or spawn of certain crustaceans such as the lobster
roe
Noun
eggs of female fish
roe
Noun
fish eggs or egg-filled ovary
rivulus
Noun
found in small streams of tropical America
rabbitfish
Noun
large European chimaera
requiem shark
Noun
any of numerous sharks from small relatively harmless bottom-dwellers to large dangerous oceanic and coastal species
ray
Noun
cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside