paraphysis

noun3

1. •
   A minute jointed filament growing among the archegonia and antheridia of mosses, or with the spore cases, etc., of other flowerless plants.

   • Spores tetrahedral, paraphyses mastoid-claviform, scales smooth, entire. — 1899
2. •
   A type of sterile cell amongst the spore-bearing asci.
3. •
   A derivative of the roof-plate of the telencephalon.