| xanthidium | <botany> A genus of minute unicellular algae of the desmids. These algae have a rounded shape and are armed with glochidiate or branched aculei. Several species occur in ditches, and others are found fossil in flint or hornstone. Origin: NL, fr. Gr. Xanqos = yellow. Source: Websters Dictionary (01 Mar 1998) |
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