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dis·coid(dĭs′koid′) also dis·coi·dal (dĭ-skoid′l)
1. Having a flat, circular form; disk-shaped.
2. Related to or having a disk.
3. Having disk flowers only. Used of a composite flower head.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.