peptide
ペプチド
解説 Definition
peptide は、アミノ酸が短くつながった物質を指す「ペプチド」という意味です。日本語のカタカナ語とほぼ同じ意味で、化学・生物学・化粧品などの文脈で使われます。
A peptide is a substance consisting of a relatively short chain of amino acids joined by peptide bonds. Peptides occur naturally in living organisms and may act as hormones, signals, or structural components, and they can also be produced for research, medicine, or cosmetics.
覚え方のコツ Memory Tip
peptide は amino acids が peptide bonds で短く連なった物質です。protein より短い鎖を思い浮かべ、small peptide、peptide hormone、peptide sequence などの組み合わせで覚えます。pepsin や dyspepsia と同じく、語源には「消化」に関係する核があります。
Picture several amino acids linked into a short chain. That image captures the central meaning of peptide and distinguishes it from protein, which generally refers to a larger, more complex biological molecule. Useful combinations include small peptide, peptide bond, peptide hormone, and peptide sequence. The beginning pept- also appears in words historically associated with digestion, such as pepsin and dyspepsia. This connection can help you recognize the scientific form without inventing a sound-based story: a peptide is a real chemical chain, not simply any cosmetic ingredient called a “peptide.”
例文
This peptide is made of several amino acids.
このペプチドはいくつかのアミノ酸からできています。
The lab studied how the peptide changes in water.
研究室はそのペプチドが水中でどう変化するかを調べました。
A small peptide can still play an important role in the body.
小さなペプチドでも体内で重要な役割を果たすことがあります。
peptide の類義語・関連語
派生語
紛らわしい語
peptide の語源・成り立ち Etymology
peptide はドイツ語 Peptid 経由で、ギリシャ語 peptos「消化された・煮られた」にさかのぼります。pept- は「消化する」の感覚を持ち、-ide は化学で「〜由来の化合物」を作る接尾辞です。pepsin, dyspepsia も同根で、「消化に関わる物質名」から意味が見えます。
English peptide was formed through German Peptid and is based on Greek peptós, meaning “cooked” or “digested,” from péssein, “to cook or digest.” The element reflects the term’s historical connection with products obtained during the digestion of proteins. The chemical ending -ide is common in names of substances and compounds. Related scientific words such as pepsin and dyspepsia ultimately draw on the same Greek family associated with digestion.
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