carboxylation car·box·yl·a·tion (kär-bŏk'sə-lā'shən)
n.
The introduction of a carboxyl group into a compound or molecule.
| 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 screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |