orthostichy
Syllabification: (or·thos·ti·chy)
Pronunciation: /ôrˈTHästikē/
Definition of orthostichy
noun ( plural orthostichies)
Botany- (in phyllotaxis) a vertical row of leaves arranged one directly above another. Contrasted with parastichy.
Origin:
late 19th century: from ortho- 'upright, straight' + Greek stikhos 'row, rank'