Dictionary.com
Thesaurus.com

tetrabrach

American  
[te-truh-brak] / ˈtɛ trəˌbræk /

noun

Classical Prosody.
  1. a metrical foot or word of four short syllables.


tetrabrach British  
/ ˈtɛtrəˌbræk /

noun

  1. (in classical prosody) a word or metrical foot composed of four short syllables ( )

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of tetrabrach

< Greek tetrábrachys having four short syllables. See tetra-, brachy-