About
The character 蚜 (yá) is a phono-semantic compound used in entomology to name small, plant-eating insects, especially aphids. Its left side is the insect radical 虫 (chóng), which places it in the semantic category of insects and similar creatures. The right side is 牙 (yá), meaning 'tooth', which provides the pronunciation. Etymologically, it was created to label sap-sucking agricultural pests, commonly called 'yáchóng' (蚜虫), known for damaging crops. The character has no figurative or abstract meanings, serving exclusively within its biological classification, which demonstrates the precision of the radical-phonetic system for naming species.