rhombusとは意味・読み方・使い方

語源

Learned borrowing from Latin rhombus, from Ancient Greek ῥόμβος (rhómbos, “rhombus, spinning top”). Doublet of rhomb and rhumb.

発音

• (英国発音) IPA^(key): /ˈɹɒmbəs/
• (米国発音) IPA^(key): /ˈɹɑːmbəs/

名詞

rhombus (複数形 rhombi または rhombuses)

1. (geometry) A parallelogram having all sides of equal length. [from 16th c.]
   1. The rhombus diamond, as one of the suits seen in a deck of playing cards ( または ).
2. In early Greek religion, an instrument whirled on the end of a string similar to a bullroarer.
   • 1936, Rollo Ahmed, The Black Art, London: Long, page 58:

     The Greeks also used an instrument called a rhombus, or witches' wheel. As the wheel spun round, it was thought that influence was gained over certain people or circumstances.

3. (zoology, now rare) Any of several flatfishes, including the brill and turbot, once considered part of the genus Rhombus, now in Scophthalmus. [from 16th c.]
   • 1638, Thomas Herbert, Some Yeares Travels, I:

     the greedy Tuberon or Shark arm'd with a double row of venemous teeth pursues them, directed by a little Rhombus, Musculus or pilot-fish that scuds to and fro to bring intelligence [...].

4. (zoology, archaic) Snails, now in genus Conus or family Conidae.

同意語

• (幾何学): diamond (not in technical use), lozenge (if not square), rhomb

関連する語

派生語

• rhombus star

参照

• rhombus at OneLook Dictionary Search
• “rhombus” in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

Latin

別の表記

• rombus, rumbus (Medieval Latin)

語源

From Ancient Greek ῥόμβος (rhómbos, “rhombus, spinning top”), from ῥέμβω (rhémbō, “I turn around”).

発音

• (Classical) IPA^(key): /ˈrom.bus/, [ˈrɔmbʊs̠]
• (Ecclesiastical) IPA^(key): /ˈrom.bus/, [ˈrɔmbus]

名詞

rhombus m (genitive rhombī); second declension

1. rhombus (幾何学)
2. flatfish
3. a magician's circle
4. (Medieval Latin) sturgeon

   Synonym: sturiō

   Hyponym: carrocō

語形変化

Second-declension noun.

派生した語

• Catalan: rom
• Portuguese: rumo
• Spanish: rumbo, romo
  • → English: rhumb
• Sicilian: rummu

Borrowings