Definitions

1. noun

A type of worm, specifically a type of parasitic worm that lives in the body of an invertebrate.

“The study of invertebrate parasites led researchers to discover a new species of acephalan worm.”

2. noun

A type of parasitic worm, especially one that is parasitic to invertebrates.

“The acephalan worm was found to have a detrimental effect on its host’s nervous system.”