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protonema n. 原丝体,丝状体 原丝体,丝状体 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]
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