Oospore(redirected from oospores)
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Related to oospores: Basidiospores
the resting zygote in lower plants that have an oogonium. The oospore has a considerable reserve of nutritive matter, which is used during sprouting, and a thick, multilayer wall, which provides protection from such unfavorable conditions as drought or cold. When the oospore sprouts, its nucleus divides with reduction.