the homologous series of unsaturated, aliphatic hydrocarbons containing one double bond and having the general formula C n H 2n , as ethylene, H 2 C=CH 2 .
(chem) the homologous series of unsaturated hydrocarbons that contain one double bond and have the general formula, CnH2n; alkene series
The alkene series. See under alkene.
noun, Chemistry. 1. (def 1). noun 1. a more formal name for ether (sense 1) ethyl ether n. See diethyl ether. ethyl ether See ether.
noun, Chemistry. 1. the univalent group, C 2 H 5 –, derived from ethane.
- Ethmoidal labyrinth
ethmoidal labyrinth n. A mass of air cells with thin bony walls forming part of the lateral wall of the nasal cavity. Also called ectethmoid.
- Ethmoidal foramen
ethmoidal foramen n. Either of two foramina, anterior and posterior, formed by grooves on either edge of the ethmoidal notch of the frontal bone and by similar grooves on the ethmoid bone.