Roost, s. That on which a bird sits to sleep; the act of sleeping.
Roost, v. To sleep as a bird.
Rope, s. A cord, a string, a halter.
Ropy, a. Viscous, tenacious, glutinous.
Rosin, s. Inspissated turpentine.
Rosin, v. To rub with rosin.
Rostrum, s. The beak of a bird; the beak of a ship. Rostrum cultratum (Linn.), in ornithology, is a term used when the edges of the bill are very sharp, as in that of the crow. When the bill is notched near the tip, as in shrikes, thrushes, &c., it is called by Linnæus rostrum emarginatum.
Rot, v. To make putrid, to bring to corruption.
Rot, s. A distemper among sheep in which their lungs are wasted; putrefaction; putrid decay.
Rotary, a. Whirling as a wheel. A motion peculiar to the flight of the hawk tribe.