nountegmina

• 1Entomology
  A sclerotized forewing serving to cover the hindwing in grasshoppers and related insects.

  ‘Collecting sites were chosen on the basis of previous collecting experience, and crickets were identified on the basis of differences in body length, hind wing length, ovipositor length, and tegmina color.’

  More example sentences

  • ‘Predators mistaking the pinnule tips for the tegmen could take bites out of the distal parts of the pinnules.’
  • ‘Male grasshoppers court females by a producing a signal made by alternate stridulation, which is rubbing one hind leg against the tegmen, which produces sound.’

• 2Botany
  The delicate inner protective layer of a seed.

  ‘In the recurved margins of the seed, the tegmen was wedge-shaped.’

  More example sentences

  • ‘By contrast, in treated dormant seed, the tegmen appears intact and not expanded.’
  • ‘The symptomless infected seeds carry thin and hyaline mycelium in the tegmen, endosperm, and space between the endosperm and embryo.’

• 3

  (also tegmen tympani)

  Anatomy
  A plate of thin bone forming the roof of the middle ear, a part of the temporal bone.

  ‘Another ligament attaches to the body of the incus and binds it to the roof of the middle ear (tegmen tympani).’

  More example sentences

  • ‘At the blind end of this chamber, the bone forms the tegmen tympani.’
  • ‘Middle cranial fossa exploration revealed two punched out defects in the dura, with generalised dural thinning, overlying the tegmen and mastoid dural plate, which were eroded.’
  • ‘A CT scan revealed a destructive process involving the right middle ear cavity that extended to involve the mastoid, attic, tegmen and bony component of the external auditory canal.’
  • ‘The condition is usually related to tegmen erosion due to aberrant arachnoid granulations.’