What's the difference between i.e. and e.g.?
1650s, coined in French (1650s) as a scientific term to describe gases, from Modern Latin elasticus, from Greek elastos "ductile, flexible," related to elaunein "to strike, beat out," of uncertain origin. Applied to solids from 1670s. Figurative use by 1859. The noun, "cord or string woven with rubber," is 1847, American English.
elastic e·las·tic (ĭ-lās'tĭk)
Having the property of returning to the original shape after being distorted.