oosporen.

1865 M. C. Cooke Rust, Smut, Mildew, & Mould 131 After this contact of the two bodies, the gonosphere acquires a new name, and is called an ‘oospore’.

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 235 The size of the antherozoids is so inconsiderable that they scarcely add..to the mass of the oosphere, but yet produce a change in it, one consequence of which is that it becomes invested with a firm cell-wall, and then constitutes the Oospore.

1915 Science 22 Oct. 580/2 A pythiaceous fungus has been..successfully inoculated into almond, which readily develops an oospore stage.

1946 A. Nelson Princ. Agric. Bot. xxv. 474 Those [sc. sexually produced spores] produced by heterogamy (fusion of dissimilar gametes) are referred to as oospores.

1978 Bull. Brit. Mycol. Soc. 12 ii. 119 At sub-lethal concentrations thickened wall, abundant lomasome and abnormal peg-like wall ingrowths were observed in sporangia, encysted zoospores, oogonia and oospores.

1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) ii. 168/1 Such developed zygotes are called oospores or, sometimes, zygospores, after an analogous structure of zyomycotes.

1890 Cent. Dict. Oösporiferous, in bot., bearing oöspores.

1896 Bot. Gaz. 21 331 General habit of an oosporiferous plant of medium size.

1890 Cent. Dict. Oösporous, in bot., having or producing oöspores.

1957 Q. Rev. Biol. 32 291/1 To describe the chytrids..as being oosporous..will prove a sore strain on the morphological conscience of discriminating mycologists.