英和和英

語源

From 中期英語 concentrik, from Middle French concentrique, from Medieval Latin concentricus, from Latin con- (“with, together”) + centrum (“circle, center”). Equivalent to con- +‎ -centric. By surface analysis, con- +‎ centre +‎ -ic.

発音

• 韻: -ɛntɹɪk

形容詞

concentric (comparative more concentric, superlative most concentric)

1. (geometry) Having a common center.
   • 2020 August 26, Tim Dunn, “Great railway bores of our time!”, in Rail, page 45:

     Seven huge concentric semi-circular rings of stone surround the northern end, and quite rightly are Grade 2-listed by conservation body Historic England.

   • 2025 February 11, Richard Clements, “First, Love Locally: JD Vance and ‘Ordo Amoris’”, in Word on Fire‎, archived from the original on 15 February 2025:

     The ordo amoris can be conceptualized as a series of concentric circles radiating outward from ourselves, beginning with loving God, who is, as Augustine put it, “closer to us than we are to ourselves,” and ending with loving the rest of the world outside our own country.

2. (physiology) (of a motion) in the direction of contraction of a muscle. (E.g. extension of the lower arm via the elbow joint while contracting the triceps and other elbow extensor muscles; closing of the jaw while flexing the masseter).

   Antonym: eccentric. Concentric and eccentric movements are collectively referred to as isotonic (with motion), the antonym of which is isometric (without motion).

反意語

• (antonym(s) of “physiology”): eccentric

派生語

関連する語

• concentricity
• semiconcentric

派生した語

• Japanese: コンセント (konsento)
• Korean: 콘센트 (konsenteu)

参考

• concentric on Wikipedia.Wikipedia
• “concentric”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.