from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having only two nerves.
from the GNU version of the Collaborative International Dictionary of English
- adj. Two-nerved; -- applied to leaves which have two longitudinal ribs or nerves.
- adj. Having only two nerves, as the wings of some insects.
from The Century Dictionary and Cyclopedia
- Two-nerved; especially, in botany, having two longitudinal ribs: applied to certain leaves.
- In entomology, having two nervures or veins, as an insect's wing.
Latin bis twice + nervus sinew, nerve. (Wiktionary)