sorus

so·rus  (sôrs, sr-)

n. pl. so·ri (sôr, sr)

1. A cluster of sporangia borne on the underside of a fern frond.

2. A reproductive structure in certain fungi and lichens.

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[New Latin srus, from Greek sros, heap; see teu- in Indo-European roots.]

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sorus [ˈsɔːrəs]

n pl -ri [-raɪ]

1. (Life Sciences & Allied Applications / Botany) a cluster of sporangia on the undersurface of certain fern leaves

2. (Life Sciences & Allied Applications / Botany) any of various similar spore-producing structures in some lichens and fungi

[via New Latin from Greek sōros a heap]

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sorus  (sôrs)

Plural sori (sôr)

1. A cluster of sporangia borne on the underside of a fern frond. A sorus is sometimes covered by an indusium. Also called fruitdot.

2. A reproductive structure consisting of masses of spores, characteristic of certain fungi such as rusts and smuts.

Thesaurus

Noun	1.	sorus - a spore-producing structure in certain lichens and fungi reproductive structure - the parts of a plant involved in its reproduction
	2.	sorus - cluster of sporangia usually on underside of a fern frond reproductive structure - the parts of a plant involved in its reproduction indusium - a membrane enclosing and protecting the developing spores especially that covering the sori of a fern