Definitions

1. noun

A taxonomic rank below species and above subspecies, typically denoting a group of organisms sharing certain characteristics.

“The new discovery was classified as a distinct species and its subspecies, including the acaphaline variant found in the southern region.”

2. adjective

Lacking a head or chief; in biology, having no head or distinct head region.

“Acephaline organisms often exhibit unique body structures to compensate for the absence of a distinct head region.”