Share this entry

Share this page

orthostichy

Syllabification: or·thos·ti·chy
Pronunciation: /ôrˈTHästikē
 
/

Definition of orthostichy in English:

noun (plural orthostichies)

Botany
(In phyllotaxis) a vertical row of leaves arranged one directly above another. Contrasted with parastichy.
Example sentences
  • Longitudinal section of shoot apex and an orthostichy of leaf primordia that are forming a rib.
  • Typically, they traverse the same number of internodes between the position at which they diverge from the minor axial bundles until they enter the branch base as the number of leaf orthostichies on the shoot.
  • Phyllotactic rows are easiest to identify in columnar cacti because vertically aligned leaf primordia merge together forming ribs (orthostichies).

Origin

late 19th century: from ortho- 'upright, straight' + Greek stikhos 'row, rank'.

Definition of orthostichy in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day snarf
Pronunciation: snɑːf
verb
eat or drink quickly or greedily