rhizoid adjective & noun. ['rʌɪzɔɪd] M19.
[from Greek rhiza root + -OID.]
Botany.
A. adjective. Resembling a root. rare. M19.
b. noun. A filamentous outgrowth on the underside of the thallus in various lower plants, esp. bryophytes, which serves both to anchor the plant and to conduct water. M19.

■ rhi'zoidal adjective pertaining to or of the nature of a rhizoid L19.

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