quadriliteral

[kwod-ruh-lit-er-uh l]
noun
  1. a quadriliteral word or root.

Origin of quadriliteral

First recorded in 1765–75; quadri- + literal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for quadriliteral
adj.

"consisting of four letters," 1771, from quadri- + literal.

Online Etymology Dictionary, © 2010 Douglas Harper