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zoogonidium
zoogonidium n. 
/ˌzəʊə(ʊ)ɡəˈnɪdɪəm/, /ˌzuəɡəˈnɪdiəm/ (plural zoogonidia) [after scientific Latin zoogonidium (1855 or earlier)] now rare (in algae) a motile gonidium.
Brit. /ˌzuːə(ʊ)ɡəˈnɪdɪəm/
, /ˌzuːə(ʊ)ɡəˈnɪdɪəm//ˌzəʊə(ʊ)ɡəˈnɪdɪəm/U.S. /ˌzoʊəɡəˈnɪdiəm/
, /ˌzoʊəɡəˈnɪdiəm//ˌzuəɡəˈnɪdiəm/ΘΚΠ
the world > plants > particular plants > algae > [noun] > parts, cells, or spores
anthosperm1844
trichosporangium1857
zoogonidium1857
octospore1870
macrozoogonidium1880
parthenospore1881
akinete1884
parthenogonidium1885
parthenosperm1889
phycobilin1945
phycobiliprotein1966
phycobilisome1966
phycoplast1972
1857 Trans. Microsc. Soc. 5 94 Zoogonidia, which become united after a motile stage, and grow into immotile cells.
1872 H. C. Wood Contrib. Hist. Freshwater Algæ 99 Non-sexual propagation taking place by means of motile gonidia (..by some called zoogonidia).
1936 A. H. S. Lucas Seaweeds S. Austral. 32 Zoogonidia very numerous, biciliate.
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