rostrulum

== English == === Etymology === Diminutive of Latin rostrum a beak. === Noun === rostrulum (plural rostrula) (obsolete, entomology, anatomy) A little rostrum (beak-like projection of an insect). === References === “rostrulum”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.