Definition of calyx in English:


See synonyms for calyx on

Translate calyx into Spanish

nounplural noun calyces/ˈkāləˌsēz/ /ˈkal-/ , plural noun calyxes

(also calix)
  • 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.’



/ˈkāliks/ /ˈkeɪlɪks/


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