Definition of plica in English:


Pronunciation: /ˈplʌɪkə//ˈplɪkə/


  • 1Anatomy
    A fold or ridge of tissue.

    • ‘The plesiomorphic condition in both adults and larvae of the lorica seems to be a thin lorica with many plicae.’
    • ‘Fibrosis of the tubal plicae was noticed in 35.5% of the specimens and was graded as mild, moderate, or severe.’
    • ‘These commarginal lirae broadly tongue dorsally across plicae and ventrally across interspaces.’
    • ‘Commissure crenulated at intersection with plicae and nodes posteriorly.’
    • ‘The alar plica or alar folds are prominent crescentic folds of synovial membrane, extending dorsalward on each side of the patella from the base of the infrapatellar synovial fold.’
    1. 1.1Botany
      A small lobe between the petals of a flower.
      • ‘The Plica Triangularis extended into the right frontal lobe.’
      • ‘In addition the plicae/petal size relationship was of the Gentians sap onaria type.’
      • ‘Loxochlamys having 13-15 prominent radial rounded-trigonal plicae that begin early in ontogeny and remain of moderate height throughout ontogeny.’
  • 2Medicine
    [mass noun] A densely matted condition of the hair.

    • ‘Diseased hairshafts are likely to be more susceptible to Plica polonica.’
    • ‘It has been suggested that Plica Polonica may be associated with damage to sections of the cuticle.’


Mid 17th century: modern Latin, from medieval Latin, fold, from plicare to fold.