noun, plural soredia [suh-ree-dee-uh] (in a lichen)
a group of algal cells surrounded by hyphal tissue, occurring on the surface of the thallus and functioning in vegetative reproduction.
Also called brood bud, hologonidium.

1820–30; < Neo-Latin, diminutive of Greek sōrós a heap

sorediate [suh-ree-dee-it, -eyt] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
soredium (sɔːˈriːdɪəm)
an organ of vegetative reproduction in lichens consisting of a cluster of algal cells enclosed in fungal hyphae: dispersed by wind, insects, or other means
[C19: New Latin, from Greek sōros a heap]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences for soredia
For reproduction, lichen possess isidia, soredia, and undergo simple fragmentation.
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