GEOLOGY

Detailed explanation-1: -hydro-A prefix that means: “water” (as in hydroelectric) or “hydrogen, ” (as in hydrochloride).

Detailed explanation-2: -before vowels hydr-, word-forming element in compounds of Greek origin, meaning “water, ” from Greek hydro-, combining form of hydor “water” (from suffixed form of PIE root *wed-(1) “water; wet"). Also sometimes a combining form of hydrogen.

Detailed explanation-3: -hydro-in American English combining form. a combining form meaning “water, ” used in the formation of compound words. hydroplane. hydrogen. Also (esp before a vowel): hydr-

Detailed explanation-4: –hydr-comes from Greek, where it has the meaning “water. ‘’ This meaning is found in such words as: carbohydrate, dehydration, hydrant, hydraulic, hydrocarbon, hydroelectric, hydrofoil, hydrogen, hydrophobia, hydroplane, hydroponics, hydrotherapy.

Detailed explanation-5: -Hydr– comes from Greek hýdōr, meaning “water.” The second of these senses is “hydrogen, ” and this form of hydr– is occasionally used in a variety of scientific terms, especially in chemistry. Hydrogen, the lightest of the elements, combines with oxygen to form water. The word hydrogen comes from the French hydrogène.