(noun; Latin rostellum
, small beak): 1. A small beak or rostrum
2. (Arthropoda: Insecta) The tubular piercing and sucking mouth parts.
3. (Brachiopoda) Low projection between anterior muscle scars to which internal oblique muscles are attached.
4. (Platyhelminthes: Cestoda) A rounded prominence on the anterior end of the scolex, often furnished with retractile spines or hooks; sometimes referred to as an aclid organ.
5. (Platyhelminthes: Trematoda) An anterior holdfast
See also: rhynchus