ENS, noun [Latin ens part. present of esse, to be.] Entity; being; existence. Among the old chimists, the power, virtue or efficacy, which certain substances exert on our bodies; or the things which are supposed to contain all the qualities or virtues of the ingredients they are drawn from, in little room. [little used.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI