noun, plural gonidia [goh-nid-ee-uh] .
(in algae) any one-celled asexual reproductive body, as a tetraspore or zoospore.
an algal cell, or a filament of an alga, growing within the thallus of a lichen.

1835–45; < Neo-Latin, equivalent to gon- gon- + -idium noun suffix

gonidial, gonidic, adjective
gonidioid, adjective
intergonidial, adjective
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World English Dictionary
gonidium (ɡəˈnɪdɪəm)
n , pl -ia
1.  a green algal cell in the thallus of a lichen
2.  an asexual reproductive cell in some colonial algae
[C19: from New Latin, diminutive from gono-]

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American Heritage
Science Dictionary
gonidium   (gō-nĭd'ē-əm)  Pronunciation Key 
Plural gonidia
  1. An asexual reproductive cell found in certain algae that form colonies. Gonidia undergo repeated mitoses to form new colonies, which then hatch out of the parent colonies.

  2. A chlorophyll-bearing, photosynthetic algal cell housed in the thallus of a lichen.

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