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| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a gadget; dingus; thingumbob. |
| hydro- or (sometimes before a vowel) hydr- | |
| —combining form | |
| 1. | indicating or denoting water, liquid, or fluid: hydrolysis; hydrodynamics |
| 2. | indicating the presence of hydrogen in a chemical compound: hydrochloric acid |
| 3. | indicating a hydroid: hydrozoan |
| [from Greek hudōr water] | |
| hydr- or (sometimes before a vowel) hydr- | |
| —combining form | |
| [from Greek hudōr water] | |
hydro- or hydr-
pref.
Water; liquid: hydrocephalus.
Hydrogen: hydrochloride.
| hydro-
A prefix that means: "water" (as in hydroelectric) or "hydrogen," (as in hydrochloride). |