Definition of calyx in English:


Line breaks: calyx
Pronunciation: /ˈkalɪks
, ˈkeɪ-/
(also calix)

noun (plural calyces /-lɪsiːz/ or calyxes)

  • 1 Botany The sepals of a flower, typically forming a whorl that encloses the petals and forms a protective layer around a flower in bud. Compare with corolla.
    More example sentences
    • Similar to the color traits, plant prickles were also evaluated for individual organs including stem, leaf, and flower and fruit calyxes.
    • Unlike with other bulb flowers, the calyxes of amaryllises do not open quickly, so consider this when using them in flower arrangements for certain occasions.
    • The flower has a tubular calyx with four ovate lobes and a corolla with four overlapping petals.
  • 2 Zoology A cup-like cavity or structure, in particular:
  • 2.1A portion of the pelvis of a mammalian kidney.
    More example sentences
    • The renal pelvis, calyces, and renal vein were grossly uninvolved.
    • You seem to be having a stone in the lower calyx of the right kidney.
    • In this case, the calyces are compressed by the markedly distended renal pelvis.
  • 2.2The cavity in a calcareous coral skeleton that surrounds the polyp.
    More example sentences
    • The polyp lived on top of a tabula in a depression in the top of the coral called the calyx.
  • 2.3The plated body of a crinoid, excluding the stalk and arms.
    More example sentences
    • The pattern of proximal axes being more aborally inclined than are distal axes is similar to that in C axes of crinoid calyx plates.
    • Although very few crinoid calyxes were encountered in the samples, columnals were ubiquitous and provided the basis for identification of crinoid genera.
    • The characters that make this species distinct from the members of the C. sampsoni clade are primarily the thin-plated calyx and basal plates, which are higher than wide.


late 17th century: from Latin, from Greek kalux 'case of a bud, husk', related to kaluptein 'to hide'.

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