| roller | a grounder that rolls along the infield |
| roller skating | skating on wheels |
| transplant transplantation organ transplant | an operation moving an organ from one organism (the donor) to another (the recipient), he had a kidney transplant, the long-term results of cardiac transplantation are now excellent, a child had a multiple organ transplant two months ago |
roller tumbler
tumbler pigeon | pigeon that executes backward somersaults in flight or on the ground |
| roller | Old World bird that tumbles or rolls in flight, related to kingfishers |
European roller
Coracias garrulus | common European blue-and-green roller with a reddish-brown back |
| ground roller | Madagascan roller with terrestrial and crepuscular habits that feeds on e.g. insects and worms |
leaf roller
leafoller | moth whose larvae form nests by rolling and tying leaves with spun silk |
lateral line
lateral line organ | sense organs of fish and amphibians, believed to detect pressure changes in the water |
| American organ | a freeeed instrument in which air is drawn in through reeds by suction bellows |
ball bearing
needle bearing
roller bearing | bearings containing small metal balls |
barrel organ
grind organ
hand organ
hurdy gurdy
hurdy-gurdy
street organ | a musical instrument that makes music by rotation of a cylinder studded with pegs |
| boards | the boarding that surrounds an ice hockey rink |
| boards | the stage of a theater, most actors love to stride the boards |
calliope
steam organ | a musical instrument consisting of a series of steam whistles played from a keyboard |
curler
hair curler
roller crimper | a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it, a woman with her head full of curlers is not a pretty sight |
electric organ
electronic organ
Hammond organ
organ | (music) an electronic simulation of a pipe organ |
| garden roller | heavy cast-iron cylinder used to flatten lawns |
harmonica
mouth organ
harp mouth harp | a small rectangular freeeed instrument having a row of free reeds set back in air holes and played by blowing into the desired hole |
harmonium
organ reed organ | a freeeed instrument in which air is forced through the reeds by bellows |
organ
pipe organ | wind instrument whose sound is produced by means of pipes arranged in sets supplied with air from a bellows and controlled from a large complex musical keyboard |
| organ loft | a gallery occupied by a church organ |
organ pipe
pipe pipework | the flues and stops on a pipe organ |
| organ stop | a graduated set of organ pipes of like tone quality |
| paint roller | a roller that has an absorbent surface used for spreading paint |
rock bit
roller bit | a drill bit that has hardened rotating rollers |
| roller | a cylinder that revolves |
| roller | a small wheel without spokes (as on a roller skate) |
| roller bandage | bandage consisting of a strip of sterile fabric (of variable width) rolled into a cylinder to facilitate application |
| roller blind | a window shade that rolls up out of the way |
roller coaster
big dipper
chute-thehute | elevated railway in an amusement park (usually with sharp curves and steep inclines) |
| roller skate | a shoe with pairs of rollers fixed to the sole |
| roller towel | a towel with the ends sewn together, hung on a roller |
steamroller
road roller | vehicle equipped with heavy wide smooth rollers for compacting roads and pavements |
contractile organ
contractor | a bodily organ that contracts |
| organ | a fully differentiated structural and functional unit in an animal that is specialized for some particular function |
vital organ
vitals | a bodily organ that is essential for life |
| external organ | an organ that is situated on or near the surface of the body |
internal organ
viscus | a main organ that is situated inside the body |
sense organ
sensory receptor
receptor | an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation |
tastebud
taste bud
gustatory organ | an oval sensory end organ on the surface of the tongue |
speech organ
vocal organ
organ of speech | any of the organs involved in speech production |
| organ of hearing | the part of the ear that is responsible for sensations of sound |
| organ of Corti | the hearing organ of the inner ear, contains receptors that respond to sound waves |
gland
secretory organ
secretor
secreter | any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream |
excretory organ
urinary organ | an organ that separates waste substances from the blood and discharges them |
organelle
cell organelle
cell organ | a specialized part of a cell, analogous to an organ, the first organelle to be identified was the nucleus |
| end organ | a specialized structure at the peripheral end of some motor or sensory nerve fibers |
reproductive organ
sex organ | any organ involved in sexual reproduction |
genitalia
genital organ
genitals
private parts
privates
crotch | external sex organ |