volvation

uncountable

A defence mechanism, in some animals, in which they roll themselves up in a ball.

Japanese Meaning

一部の動物が身を守るため、体を丸めて防御する行動

The pill bug's volvation, which it uses to protect its soft underside, often surprises curious children.

ダンゴムシが体の柔らかい腹部を守るために行う体を丸める防御行動は、好奇心旺盛な子どもたちをよく驚かせる。

Sense（1）

A defence mechanism, in some animals, in which they roll themselves up in a ball.