The Collaborative International Dictionary of English v.0.48:

Fet \Fet\, n. [Cf. feat, F. fait, and It. fett? slice, G. fetzen
   rag, Icel. fat garment.]
   A piece. [Obs.] --Dryton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fet \Fet\, v. t. [OE. fetten, feten, AS. fetian; akin to AS.
   f[ae]t a journey, and to E. foot; cf. G. fassen to seize.
   [root] 77. See Foot, and cf. Fetch.]
   To fetch. [Obs.]
   [1913 Webster]

         And from the other fifty soon the prisoner fet.
                                                  --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fet \Fet\, p. p. of Fette.
   Fetched. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fette \Fet"te\ (? or ?), v. t. [imp. Fette, p. p. Fet.] [See
   Fet, v. t.]
   To fetch. [Obs.] --Chaucer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

FET
    n 1: a transistor in which most current flows in a channel whose
         effective resistance can be controlled by a transverse
         electric field [syn: field-effect transistor, FET]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

FET
       Field Effect Transistor