from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Botany Arranged in two vertical rows on opposite sides of an axis: distichous leaves.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Arranged in two rows on each side of an axis
from The Century Dictionary and Cyclopedia
- Disposed in two rows; biserial; bifarious; dichotomous; specifically, in botany, arranged alternately in two vertical ranks upon opposite sides of the axis, as the leaves of grasses, elms, etc. Also distich.
From Latin distichus, having two rows, from Greek distikhos; see distich.(American Heritage® Dictionary of the English Language, Fourth Edition)