'Protonema' definitions:

Definition of 'Protonema'

From: GCIDE

Protonema \Pro`to*ne"ma\, n.; pl. Protonemata. [NL., fr. Gr. ? first + ?, ?, a thread.] (Bot.) The primary growth from the spore of a moss, usually consisting of branching confervoid filaments, on any part of which stem and leaf buds may be developed. [1913 Webster]