‘昆虫’ (kūn chóng) is the standard Mandarin term for ‘insect’. It is a compound noun formed by two characters: 昆 (kūn), which historically means ‘numerous’ or ‘multitudinous’, and 虫 (chóng), meaning ‘insect’ or ‘creature’. Together, they evoke the idea of small, many-legged, invertebrate animals—typically with three body segments (head, thorax, abdomen), six legs, and often wings. The character 昆 originally appeared in classical texts to describe swarming or abundant creatures, reinforcing the biological diversity and sheer number of insect species.

This word is used broadly in scientific, educational, and everyday contexts—whether naming specific types (e.g., 蚂蚁 ‘ant’, 蝴蝶 ‘butterfly’) or referring to insects collectively. Unlike colloquial terms like 小虫 (xiǎo chóng, ‘little bug’), 昆虫 carries neutral-to-formal register and is appropriate in textbooks, nature documentaries, and museum exhibits. It excludes other arthropods like spiders (which are 蛛形纲, not insects) and centipedes, reflecting precise biological classification.