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n. pl. pa·raph·y·ses (-sēz′)
One of the erect sterile filaments often occurring among the reproductive organs of certain fungi, algae, and mosses.
[New Latin : para- + Greek phusis, nature, growth; see physic.]
n, pl -ses (-ˌsiːz)
(Botany) any of numerous sterile cells occurring between the sex organs of mosses and algae and between the spore-producing bodies of basidiomycetous and ascomycetous fungi
[C19: New Latin from Greek: subsidiary growth, from para-1 + phusis growth]