noun
instar
Entomological term for a developmental stage between molts in arthropods. Used in scientific contexts.
この幼虫は三齢で蛹になる。
This larva becomes a pupa at the third instar.
noun
Obsolete reading for 齢 (よわい). In modern Japanese, 年齢 (ねんれい) or 歳 (さい) are used instead.
See also: 齢 (よわい)
古い文献では「齢」を「れい」と読んで年齢を表すことがある。
In old texts, 齢 can be read as れい to mean age.