noun
Rare zoological term for any burrowing legless amphibian of the order Gymnophiona. The cross-reference 足無井守 (あしなしいもり) is a more common Japanese name.
See also: 足無井守
無足類は熱帯地方に生息する足のない両生類である。
Caecilians are legless amphibians that inhabit tropical regions.