AC'INIFORM, adjective [Latin acinus, a grape stone, and forma, shape.] Having the form of grapes; being in clusters like grapes. The uvea or posterior lamen of the iris in the eye, is called the aciniform tunic. Anatomists apply the term to many glands of a similar formation.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI