WordReference Random House Unabridged Dictionary of American English © 2025
bi•col•lat•er•al
(bī′kə lat′ər əl),USA pronunciation adj. [Bot.]
bi′col•lat′er•al′i•ty, n.
- Botany(of a bundle) having the xylem lined with phloem on both its inner and outer faces.
- bi-1 + collateral 1880–85