phenylacetic acid phen·yl·a·ce·tic acid (fěn'əl-ə-sē'tĭk, fē'nəl-)
n.
An abnormal product of phenylalanine catabolism that appears in the urine in phenylketonuria.
| a chattering or flighty, light-headed person. |
| a scrap or morsel of food left at a meal. |