| ALCA | type genus of the Alcidae comprising solely the razorbill |
|---|---|
| ALCA | black-and-white North Atlantic auk having a compressed sharp-edged bill |
| ALCA | Greek lyric poet of Lesbos |
| ALCA | hypothetical universal solvent once sought by alchemists |
| ALCA | verse in the meter used in Greek and Latin poetry consisting of strophes of 4 tetrametric lines |
| ALCA | verse in the meter used in Greek and Latin poetry consisting of strophes of 4 tetrametric lines |
| ALCA | tending to become alkaline |
| ALCA | an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine |
| ALCA | a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine |
| ALCA | any of various Spanish fortresses or palaces built by the Moors |