Definition of digitation in US English:

digitation

noun

Zoology Botany
  • A fingerlike protuberance or division.

    • ‘The most advanced is suppressed as a synonym of Perrinites, based on the general features of conch form and suture, especially the digitation of the prongs and median saddle of the primary ventral lobe.’
    • ‘The axons from the fifth cervical nerve supply the first digitation and the sixth and seventh supply the remainder of the muscle mass.’
    • ‘Occasionally, a digitation of bone from the calcaneus to the Achilles tendon is radiographically evident and is associated with retrocalcaneal bursitis.’

Pronunciation

digitation

/ˌdijiˈtāSHən//ˌdɪdʒɪˈteɪʃən/