(botany) Hound's-tongue (Cynoglossum officinale). / (botany) Costmary (Tanacetum balsamita). / (botany) Watercress (Nasturtium officinale).

(acronym) Rigid inflatable boat — A lightweight inflatable boat with a rigid hull. / (Internet) routing information base

A dark green colour, like that of the British Army rifleman uniform.

Of a dark green colour, like that of the British Army rifleman uniform.

(biochemistry) A derivative of DNA having ribose in place of deoxyribose, and uracil in place of thymine; its primary function is in the transcription of genetic material and subsequent synthesis of protein.

A diminutive of the male given name Richard. / A surname transferred from the given name.

A diminutive of the male given name Richard, or sometimes of related names, such as Ricardo. / A surname transferred from the given name.

A surname from Welsh [in turn originating as a patronymic]. / A former town in the Rice Valley, San Bernardino County, California. / An unincorporated community in Cloud County, Kansas.

(obsolete, slang) To be hanged on the gallows.

The rabble; crowds; the common people. / Sweepings; refuse.