oogoniumPronunciation: /ˌəʊəˈgəʊnɪəm/Definition of oogonium noun (plural oogonia) 1 Botany the female sex organ of certain algae and fungi, typically a rounded cell or sac containing one or more oospheres. 2 Biology an immature female reproductive cell that gives rise to primary oocytes by mitosis. Origin: mid 19th century: from oo- 'of an egg' + Greek gonos 'generation' + -iumoogonium in other Oxford dictionaries Definition of oogonium in the US English dictionary
