combining form
or hydro-
Etymology: alteration (influenced by Latin hydr-, hydro- ) of Middle English ydr-, ydro-, from Old French ydr- & Middle French ydro-, from Latin hydr-, hydro-, from Greek, from hydōr — more at water
1.
a. : water
hydro gel
hydro electricity
b. : hydraulic
hydro press
2. : water-loving organism — chiefly in generic names
Hydr acarina
Hydro dictyon
3.
a. : hydrogen : containing hydrogen
hydr iodic acid
hydro borate
b. now usually hydro- : combined with hydrogen — especially in names of organic compounds
hydro quinidine
c. : combined with water by hydration
hydr acrylic acid
or by hydrolysis
hydro cellulose
4. : characterized by an accumulation of fluid in a (specified) bodily part
hydro nephrosis
5.
a. : combined with water — in names of minerals
hydro hetaerolite
b. : characterized by addition of water or its constituents — in names of varieties of minerals
hydro mica
6.
[New Latin, from Hydra (genus of polyps)]
: hydroid
hydro medusa
hydro rhiza