| 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 chattering or flighty, light-headed person. |
PABA (pä'bə)
n.
Para-aminobenzoic acid; a crystalline para form of aminobenzoic acid that is part of the vitamin B complex, is required by many organisms for the formation of folic acids, and is widely used in sunscreens to absorb ultraviolet light. Also called vitamin Bx.
| PABA (pä'bə) Pronunciation Key
Short for para-aminobenzoic acid. A crystalline form of aminobenzoic acid that is part of the vitamin B complex. It is a growth factor required by some microorganisms, and it is often used in sunscreens. |
| PABA para-aminobenzoic acid |