[kәn'fә:vә]
n.
[植]丝状绿藻
黄丝藻

[ noun ]
any of various algae of the genus Tribonema; algae with branching filaments that form scum in still or stagnant fresh water
<noun.animal>

Conferva \Con*fer"va\, n.; pl. {Conferv[ae]}. [L., a kind of
water plant. See {Comfrey}.] (Bot.)
Any unbranched, slender, green plant of the fresh-water
algae. The word is frequently used in a wider sense.