- (botany) A long, slender cell produced among spores and having hygroscopic secondary cell wall thickenings.
- (obsolete) Elasticity; especially the expansibility of a gas.
- (zoology) An elaterid, or click beetle.
- That which elates.
- (botany) Any of the long, slender hygroscopic appendages attached to the spores of horsetails (genus Equisetum).