incisor
切歯
解説 Definition
上顎と下顎の前部にある平らな歯。食べ物を切ったり咬んだりするのに使われる。
An incisor is one of the flat, sharp teeth at the front of the mouth. These teeth are mainly used for cutting into food, and the word is common in dental and biological contexts.
覚え方のコツ Memory Tip
incisor は単独で覚えるより、歯の役割セットで整理すると残りやすいです。前で食べ物を切るのが incisor、尖って裂くのが canine、奥ですりつぶすのが molar。英語の歯の図で front teeth = incisors と一緒に見ると定着します。incision「切り込み」と形が近いので、「cut に関わる前歯」と結ぶと覚えやすいです。会話より歯科・解剖の文脈で出やすく、複数形 incisors で見ることも多い点も押さえると混乱しません。
Remember it as one member of the tooth set: `incisors` cut, `canines` tear, and `molars` grind. That makes the word easier than learning it alone. It also looks close to `incision`, so you can connect it with the idea of cutting.
例文
The incisor teeth are designed for biting and cutting food into smaller pieces.
切歯は食べ物を咬んで小さな片に切るために設計されている。
A chipped incisor can be repaired with cosmetic dental procedures.
欠けた切歯は美容歯科治療で修復できる。
Children typically lose their baby incisors around age six or seven.
子供は通常6歳または7歳の頃に乳切歯を失う。
incisor の類義語・関連語
incisor の語源・成り立ち Etymology
incisor は中世ラテン語 incisor「切るもの」からで、さらにラテン語 incidere「切り込む」へさかのぼります。in-「中へ」+ -cis-「切る」+ -or「もの」の形で、incision や excise と同根なので、「食べ物を切る歯」だと納得できます。
"Incisor" comes from Medieval Latin "incisor," meaning "something that cuts," from Latin "incidere," "to cut into." It is built from "in-" meaning "into" and a root meaning "cut." The word was applied to the front teeth because they are used for cutting food. Related English words include "incision" and "excise."
外部辞書で調べる
この単語を英単語クイズで覚えよう