Initialism of right margin. / (Mormonism) Initialism of returned missionary. / Abbreviation of room.

Third-person singular simple present indicative form of disanimate

(nautical) An officer of the lowest rank in several navies; especially, a trainee officer. / A midshipman fish.

(biochemistry) A glycoside of benzaldehyde and hydrogen cyanide found in bitter almonds, and in the kernels of some other fruit.