noun
ootheca; egg case
Entomological term for the protective casing that contains the eggs of certain insects, such as cockroaches and mantises.
ゴキブリの卵鞘は、家具の隙間などに産み付けられる。
Cockroach oothecae are often deposited in cracks of furniture.
カマキリの卵鞘は、泡状の物質で覆われている。
The mantis egg case is covered with a frothy substance.