2. (Chem.)
Defn: A combining form of hydrogen, indicating hydrogen as an ingredient, as hydrochloric; or a reduction product obtained by hydrogen, as hydroquinone.
HYDRO-AEROPLANE
Hy"dro-a"ër*o*plane`. (Aëronautics)
Defn: An aëroplane with a boatlike or other understructure that enables it to travel on, or to rise from the surface of, a body of water by its own motive power.
HYDROBAROMETER
Hy`dro*ba*rom"e*ter, n. Etym: [Hydro-, 1 + barometer.]
Defn: An instrument for determining the depth of the sea water by its pressure.
HYDROBILIRUBIN
Hy`dro*bil`i*ru"bin, n. Etym: [Hydro-, 2 + bilirubin.] (Physiol.
Chem.)
Defn: A body formed from bilirubin, identical with urobilin.
HYDROBIPLANE
Hy"dro*bi"plane, n.
Defn: A hydro-aëroplane having two supporting planes.