| rostel | Same as Rostellum. Origin: L. Rostellum, dim. Of rostrum a beak: cf. F. Rostelle. Source: Websters Dictionary (01 Mar 1998) |
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| rostellar | Pertaining to a rostellum. Source: Websters Dictionary (01 Mar 1998) |
| rostellate | Having a rostellum, or small beak; terminating in a beak. Origin: NL. Rostellatus. Source: Websters Dictionary (01 Mar 1998) |
| rostelliform | Having the form of a rostellum, or small beak. Source: Websters Dictionary (01 Mar 1998) |
| rostellum | <botany> A beak-like upward extension of the stigma in orchids. (09 Oct 1997) |