Definition of calyx in English:


(also calix)

Pronunciation /ˈkāliks/ /ˈkeɪlɪks/

Translate calyx into Spanish

nouncalyces, calyxes

  • 1Botany
    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

    ‘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.’
    • ‘He gave special attention to the pubescence of the leaves and of the calyces.’
    • ‘The real attraction, though, is the dramatic calyxes that remain after the small flower petals fall.’
  • 2Zoology
    A cuplike cavity or structure.

    1. 2.1A portion of the pelvis of a mammalian kidney.
      ‘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.’
      • ‘The major calyces unite to form the renal pelvis which is the expanded upper end of the ureter.’
      • ‘The base and sides are surrounded by cortical tissue, and the apex protrudes into the renal calyces.’
    2. 2.2The cavity in a calcareous coral skeleton that surrounds the polyp.
      • ‘The polyp lived on top of a tabula in a depression in the top of the coral called the calyx.’
      space, chamber, hollow, hole, pocket, pouch
    3. 2.3The plated body of a crinoid, excluding the stalk and arms.
      ‘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.’
      • ‘In most extant crinoids, primarily the shallow-water ones, there are two body regions, the calyx and the rays.’
      • ‘In unstalked crinoids, the cirri are located on the end of the calyx opposite the mouth, and are used by the animal to grasp the substratum.’


Late 17th century from Latin, from Greek kalux ‘case of a bud, husk’, related to kaluptein ‘to hide’.