elongate

 
Pronunciation: /ˈiːlɒŋgeɪt/

verb

[with object] (usually as adjective elongated)
  • make (something) longer, especially unusually so in relation to its width: a slender, elongated neck
  • [no object] chiefly Biology become longer: the pup’s globular body slowly elongates

adjective

Biology
  • long in relation to width; elongated: elongate fishes

Origin:

late Middle English (in the sense 'move away'): from late Latin elongat- 'placed at a distance', from the verb elongare, from Latin e- (variant of ex-) 'away' + longe 'far off', longus 'long'