Fu·cus n.; pl. Fuci
1. A paint; a dye; also, false show. [Obs.]
2. Bot. A genus of tough, leathery seaweeds, usually of a dull brownish green color; rockweed.
Note: ☞ Formerly most marine algæ were called fuci.
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fucus
n : any member of the genus Fucus
[also: fuci (pl)]