parthenogonidiumn.
/ˌpɑːθᵻnə(ʊ)ɡəˈnɪdɪəm/, U.S. /ˈˌpɑrθənoʊɡəˈnɪdiəm/ Botany. Now rare.
An algal gonidium; = gonidium n. 2a.
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the world > plants > particular plants > algae > [noun] > parts, cells, or spores
anthosperm1844
trichosporangium1857
zoogonidium1857
octospore1870
macrozoogonidium1880
parthenospore1881
akinete1884
parthenogonidium1885
parthenosperm1889
phycobilin1945
phycobiliprotein1966
phycobilisome1966
phycoplast1972
1885 Encycl. Brit. XIX. 857/1 (caption) Ripe asexually produced daughter-individual of Volvox minor, Stein, still enclosed in the cyst of the partheno-gonidium.
1895 F. W. Oliver tr. A. Kerner Nat. Hist. Plants II. 634 Daughter-colonies [of Volvox Globator] are developed from special cells, usually eight in number, called parthenogonidia,..larger than the ordinary vegetative cells.
1939 T. L. Green Pract. Animal Biol. i. 7 Look for evidence of asexual reproduction by parthenogonidia, appearing as a small colony enclosed in a thick envelope projecting into the main colony.
1945 W. O. Howarth & L. G. G. Warne Lowson's Textbk. Bot. (ed. 9) xix. 449 These are the ‘parthenogonidia’—cells specialised for non-sexual reproduction.
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).
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n.1885