A fairy (also fay, fae, fair folk; from faery, faerie, "realm of the fays") is a type of mythical being or legendary creature in European folklore, a form of spirit, often described as metaphysical, supernatural, or preternatural.
According to Thomas Keightley, the word "fairy" derives from the Latin fata, and is from the Old French form faerie, describing "enchantment". Other forms are the Italian fata, and the Provençal "fada". In old French romance, "fee" was a woman skilled in magic, and who knew the power and virtue of words, of stones, and of herbs.
Faie became Modern English fay. Faierie became fairy, but with that spelling now almost exclusively referring to one of the legendary people, with the same meaning as fay. The word "fairy" was used to in represent an illusion, or enchantment; the land of the Faes; collectively the inhabitants thereof; or an individual such as a fairy knight.
To the word faie was added the suffix -erie (Modern English -(e)ry), used to express either a place where something is found (fishery, nunnery) or a trade or typical activity engaged in (cookery, thievery). In later usage it generally applied to any kind of quality or activity associated with a particular type of person, as in English knavery, roguery, wizardry. In the sense "land where fairies dwell", the distinctive and archaic spellings Faery and Faerie are often used.
Fae or FAE may refer to:
Very-long-chain 3-oxoacyl-CoA synthase (EC 2.3.1.199, very-long-chain 3-ketoacyl-CoA synthase, very-long-chain beta-ketoacyl-CoA synthase, condensing enzyme, CUT1 (gene), CER6 (gene), FAE1 (gene), KCS (gene), ELO (gene)) is an enzyme with system name malonyl-CoA:very-long-chain acyl-CoA malonyltransferase (decarboxylating and thioester-hydrolysing). This enzyme catalyses the following chemical reaction
This is the first component of the elongase, a microsomal protein complex responsible for extending palmitoyl-CoA and stearoyl-CoA to very-long-chain acyl CoAs.