gemma definition by Webster's New World
noun pl. gemmae
Biol. a budlike outgrowth which becomes detached and develops into a new organism, as in certain liverworts
Origin: L: see gem
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- gemmaceous adjective
gemma definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. gem·mae Botany
An asexual budlike propagule as in liverworts, capable of developing into a new individual; a bud.
Origin: Latin, bud; see gembh- in Indo-European roots.
gemma - Science Definition
Plural gemmae gemmae
A budlike mass of undifferentiated tissue which serves as a means of vegetative reproduction among mosses and liverworts. The gemmae, often formed in structures called gemma cups, are usually dispersed from the parent plant by the splashing of raindrops, after which they develop into new individuals.