1690s, "to bask in the sun," from Latin apricatus, past participle of apricari "to bask in the sun," from apricus "exposed" (to the sun); perhaps contracted from *apericus, from aperire "to open." Transitive sense is recorded from 1851.
- april fool,
- april fools' day,
- april showers bring may flowers
Online Etymology Dictionary, © 2010 Douglas Harper