Pronunciation: (tu-nak'yu-lum), [key]
—pl. -laPronunciation: (-lu). [key]
1. Surg.a small sharp-pointed hook set in a handle, used for seizing and picking up parts in operations and dissections.
2. Entomol.a clasplike appendage on the abdomen of a springtail, which holds the springing device in place.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.