rhynchocoelan
Any member of the Rhynchocoela.

rhynchocoelans
plural of rhynchocoelan

rhynchocoels
plural of rhynchocoel

rhyncholite
A fossil cephalopod beak.

rhynchonella
Any member of the extinct genus †Rhynchonella of brachiopod, found in Silurian to Eocene strata worldwide.

rhynchonellas
plural of rhynchonella

rhynchonellatan
Any member of the Rhynchonellata class of brachiopods.

rhynchonelliforms
plural of rhynchonelliform

rhynchosaur
Any of several diapsid reptiles, of order Rhynchosauria, from the Triassic period

rhynchosaurian
Synonym of rhynchosaur.

rhynchosaurs
plural of rhynchosaur

rhysodid
Any member of the family Rhysodidae of wrinkled bark beetles, sometimes Rhysodini in family Carabidae.

rhysodids
plural of rhysodid

rhysodine
Any of the subfamily Rhysodinae of carabid beetles.

rhysodines
plural of rhysodine

ribaldo
Mora moro, the common mora, a deep-sea cod-like fish.

ribaldos
plural of ribaldo

ribbon snakes
plural of ribbon snake

ribbon worm
Synonym of proboscis worm.

ribbon worms
plural of ribbon worm

ribbonfish
Any of several lampriform fish, of the family Trachipteridae, having long, ribbon-like bodies.

ribbonfishes
plural of ribbonfish

ribbonworm
Alternative form of ribbon worm.

ribbonworms
plural of ribbonworm

ribogenesis
The biogenesis of RNA

ribstone
A petroglyph in the form of an animal's rib cage.

ribstones
plural of ribstone

ricaniid
Any member of the family Ricaniidae of planthoppers.

ricaniids
plural of ricaniid

ricebird
A Java sparrow (Lonchura oryzivora).
A bobolink (Dolichonyx oryzivorus).
mannikins (Lonchura), a genus
yellow-breasted bunting (Emberiza aureola)
village weaver (Ploceus cucullatus), in English-speaking West African countries

ricebirds
plural of ricebird

ricefish
Any of the family Adrianichthyidae of about 27 species of small ray-finned fish, many of which are found in Japanese rice paddies.
A freshwater fish of the southeastern United States, Chologaster cornuta

ricefishes
plural of ricefish

ricinuleid
Any member of the Ricinulei (hooded tickspiders).

rictus
A bird’s gaping mouth.
The throat of a calyx.
Any open-mouthed expression.

rictuses
plural of rictus

ridgehead
Any of the family Melamphaidae of small, deep-sea stephanoberyciform fish.

ridgeheads
plural of ridgehead

ridgel
A ridgeling.

ridgeling
A male animal with at least one testicle still in the inguinal canal.
An imperfectly castrated male.

ridgelings
plural of ridgeling

ridgels
plural of ridgel

ridgil
Alternative form of ridgel.

ridgils
plural of ridgil

ridgling
Alternative spelling of ridgeling.

ridglings
plural of ridgling

rietbok
The antelope Redunca arundinum.

rietboks
plural of rietbok

riflebird
Any of four species of birds of paradise in the genus Ptiloris.

riggald
Alternative form of ridgeling.

riggalds
plural of riggald

righteye flounders
plural of righteye flounder

riglin
Alternative form of ridgeling.

rigling
Alternative form of ridgeling.

riglings
plural of rigling

riglins
plural of riglin

rinatrix
A type of water snake formerly thought to poison water.

ringbill
Aythya collaris, a diving duck of North America with a white band around the bill.

ringbills
plural of ringbill

ringdove
the wood pigeon

ringdoves
plural of ringdove

ringed spinytail iguana
Morunasaurus annularis, a species of iguana.

ringhals
Alternative form of rinkhals.

ringhalses
plural of ringhals

ringlestone
The ringed dotterel, or ringed plover.

ringlestones
plural of ringlestone

ringneck
Any of several unrelated birds that have a ringed neck.

ringneck snake
A species of frog, Diadophis punctatus

ringnecks
plural of ringneck

ringsail
A light sail set abaft and beyond the leech of a boom-and-gaff sail.

ringsails
plural of ringsail

ringtail
A ring-tailed animal, notably:
A ring-tailed animal, notably:
A ring-tailed animal, notably:
A ring-tailed animal, notably:
A ring-tailed animal, notably:
A ring-tailed animal, notably:
A ring-tailed animal, notably:
A ringsail.
A ring-in.

rinkhals
A venomous elapid, Hemachatus haemachatus, found in parts of southern Africa.

rinkhalses
plural of rinkhals

riodinid
Any member of the Riodinidae.

riodinids
plural of riodinid

ripon
A spur (goad for a horse etc.).

ripons
plural of ripon

ripsack
The gray whale.

ripsacks
plural of ripsack

riroriro
A grey warbler, of the species Gerygone igata.

riroriros
plural of riroriro

ristellid
Any skink of the family Ristellidae

ristellids
plural of ristellid

rita
Alternative form of rta (“Vedic principle”).
Alternative form of ritha (“fish”)

ritha
A South Asian catfish, Rita rita
Indian soapberry (Sapindus mukorossi)

rittock
The common tern.

rittocks
plural of rittock

river carp
The common carp.

river chub
Nocomis micropogon, a cyprinid minnow common in North American streams.

river lamprey
European river lamprey (Lampetra fluviatilis).

river turtle
Any marine turtle that inhabits rivers.

roachback
A grizzly bear of the Bitterroot Range.

roachbacks
plural of roachback

robalo
European seabass (Dicentrarchus labrax)

robalos
plural of robalo

robin
Any of various passerine birds (about 100 species) of the families Muscicapidae, Turdidae and Petroicidae (formerly Eopsaltriidae), typically with a red breast.
Any of various passerine birds (about 100 species) of the families Muscicapidae, Turdidae and Petroicidae (formerly Eopsaltriidae), typically with a red breast.
A trimming in front of a dress.

roboanimals
plural of roboanimal

robocat
A robot resembling a cat.

robocats
plural of robocat

robodog
A robot resembling a dog.

robodogs
plural of robodog

robofish
A robotic fish; a robot designed to swim in water in the manner of a fish.

robofishes
plural of robofish

roboid
A robotic creature.

roboids
plural of roboid

robomussel
An intertidal temperature datalogger that mimics the thermal characteristics of a mussel

robomussels
plural of robomussel

robust blacksmelt
An oviparous deep-water fish, Pseudobathylagus milleri, with an adipose fin far back on its caudal peduncle.

roc
An enormous mythical bird in Eastern legend.

rock bass
A rock bass of the genus Ambloplites, especially of the species Ambloplites rupestris and Ambloplites constellatus.
A spotted grouper (Epinephelus analogus)
A starry grouper (Epinephelus labriformis)
A rivulated mutton hamlet (Alphestes multiguttatus)

rock basses
plural of rock bass

rock cod
Any of several Australian fishes of the genus Lotella

rock fish
Alternative form of rockfish.

rock lizard
Any of the small lizards, of several genera in family Lacertidae, that dwell in rocky places.
Any of the species of genus Petrosaurus in family Phrynosomatidae in suborder Iguania.

rock lizards
plural of rock lizard

rockabillies
plural of rockabilly

rockabilly
A genre of music originating from the South (United States) and mixing elements of rock, blues, country, hillbilly boogie and bluegrass music.
A member of the subculture associated with rockabilly music.

rockabillys
plural of rockabilly

rockcod
Alternative form of rock cod.

rockcods
plural of rockcod

rockhead
The surface of the bedrock beneath soil cover.
The fish Bothragonus swanii, a variety of poacher.
A stupid person.

rockheads
plural of rockhead

rockhopper
A rockhopper penguin (Eudyptes spp.).
Any of the order Archaeognatha of jumping bristletails.
A disk on the bottom of a trawler-net that lifts when it hits a rock or bump, raising the net, preventing damage to the net or the seafloor.

rockhoppers
plural of rockhopper

rockling
Any of various fishes of the Lotidae family.
Any of certain fishes from other families.

rocklings
plural of rockling

rocksnail
Any of various snails that live in rocky environments.
Any of various snails of the genus Leptoxis.

rocksnails
plural of rocksnail

rocksucker
A lamprey.

rocksuckers
plural of rocksucker

rodentsona
A fursona that is a rodent.

rodentsonas
plural of rodentsona

rodge
The grey duck.

rodges
plural of rodge

rodholith
Misspelling of rhodolith.