Etymograph

English

hemidecussation

From hemi- + decussation.

Formed from hemi- + decussation

Proto-Indo-European *sem- ‘one, whole’

Proto-Indo-European *sēmi ‘half’

English hemi-

Latin decussis ‘intersection of two lines in form of a cross’

Latin decussō ‘to divide crosswise’

Latin decussationem

English decussation

Today it means

noun The splitting of the fibres of the optic nerve such that half of each of them continue to the contralateral optic tract

Language periods are conventional ranges, not dates for this word.

Etymograph / hemidecussation