Definitions from Wiktionary (rostellum)

▸ noun:  A small beak-like process or extension; a small rostrum.
▸ noun:  (botany) A projecting part of the column in the flower of an orchid that separates the male stamen from the female gynoecium.
▸ noun:  (biology) A retractable protruding part at the anterior end of a soft-bodied tapeworm; the scolex from which it protrudes is often armed with hooks which serve to keep it in place attached to the host.



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