noun
Diapsida
A class of amniotes characterized by two temporal fenestrae in the skull. This is a technical term used in zoology and paleontology.
双弓亜綱には、恐竜や鳥類、現生の爬虫類の多くが含まれる。
Diapsida includes dinosaurs, birds, and many living reptiles.
The term is a direct translation of the scientific name Diapsida, composed of 双 (double), 弓 (arch, referring to the temporal fenestrae), and 亜綱 (subclass). The exact historical derivation of the Japanese term is uncertain, but it follows standard taxonomic naming conventions.