Pronunciation: (dis'koid), [key]
1. having the form of a discus or disk; flat and circular.
2. Bot.(of a composite flower) consisting of a disk only, without rays.
1. something in the form of a disk.
2. Dentistry.an excavator with a disklike blade.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.