sorusPronunciation: /ˈsɔːrəs/Definition of sorus noun (plural sori /-rʌɪ/) Botany a cluster of spore-producing receptacles on the underside of a fern frond. a gamete-producing or fruiting body in certain algae and fungi. Origin: mid 19th century: modern Latin, from Greek sōros 'heap'sorus in other Oxford dictionaries Definition of sorus in the US English dictionary
