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Webster 1913 Edition
Hydrocaulus
Hyˊdro-cau′lus
,Noun.
pl.
Hydrocauli
(#)
. [NL., fr. Gr.
ὕδωρ
water + [GREEK] a stalk.] (Zool.)
The hollow stem of a hydroid, either simple or branched. See Illust. of
Gymnoblastea
and Hydroidea
.