HYDROCARBONACEOUS
Hy`dro*car`bo*na"ceous, a.
Defn: Of the nature, or containing, hydrocarbons.
HYDROCARBONATE Hy`dro*car"bon*ate, n. (a) (Old Chem.) A hydrocarbon. [Obs.] (b) (Chem.) A hydrous carbonate, as malachite.
HYDROCARBOSTYRIL
Hy`dro*car`bo*sty"ril, n. Etym: [Hydro-, 2 + carbostyril.] (Chem.)
Defn: A white, crystalline, nitrogenous hydrocarbon, C9H9NO, obtained from certain derivatives of cinnamic acid and closely related to quinoline and carbostyril.
HYDROCARBURET
Hy`dro*car"bu*ret, n. Etym: [Hydro-, 2 + carburet.] (Chem.)
Defn: Carbureted hydrogen; also, a hydrocarbon. [Obs.]
HYDROCAULUS
Hy`dro*cau"lus, n.; pl. Hydrocauli. Etym: [NL., fr. Gr. "y`dwr water
+ (Zoöl.)
Defn: The hollow stem of a hydroid, either simple or branched. See
Illust. of Gymnoblastea and Hydroidea.
HYDROCELE
Hy`dro*cele, n. Etym: [L., fr. Gr. "y`dwr water + (Med.)