唾液

• ピンイン: tuò yè
• 漢字の分解: 唾 = 口 (mouth) + 垂 (hang down) — liquid hanging from the mouth; 液 = 氵(water) + 夜 (night, phonetic)

意味

唾液（だえき）

The formal and medical term for saliva — used in scientific, medical, and educational contexts. In everyday speech, people more commonly say 口水. 唾液 appears in discussions of digestion (唾液淀粉酶 = salivary amylase), forensics (DNA testing), and medicine.

例文

1. 唾液中含有淀粉酶，能帮助分解食物中的淀粉。
2. 法医从现场提取了犯罪嫌疑人遗留的唾液样本进行DNA鉴定。
3. 紧张时口腔会分泌更少唾液，导致口干舌燥。

使い方ガイド

場面: medical, scientific, forensic

トーン: technical

正しい言い方

• 唾液分泌减少会导致龋齿风险上升。(Reduced saliva secretion leads to an increased risk of tooth decay.)
• 研究人员通过分析唾液样本检测压力激素水平。(Researchers detect stress hormone levels by analysing saliva samples.)

避ける言い方

• 在日常闲聊中用'唾液'代替'口水' (唾液 sounds clinical and formal; in casual conversation use 口水)

起源と歴史

Compound of 唾 (spit — 口 mouth + 垂 hang down, suggesting dripping) + 液 (liquid, fluid). Together mean 'the liquid that drips from the mouth.'

文化的背景

世代: All ages

社会的背景: Universal