| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a scrap or morsel of food left at a meal. |
| 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] | |
hydr- pref.
Variant of hydro-.