Definitions

1. adjective

Lacking a head or head-like feature; headless or without a head.

“The species of the asexual reproducing worm was found to be acoelomate and acellular, but more significantly, acapitular or acapitellate, meaning that it lacked a head or head-like feature.”

2. noun

A person or animal that is headless or lacking a head.

“The medical team had to deal with numerous acapital patients, including some with acaphalous conditions.”

3. noun

An organism without a head or head-like structure.

“Many species of worms, like the acaphalous nematode, are found in the soil.”