Dictionary.com
Thesaurus.com

uniliteral

British  
/ ˌjuːnɪˈlɪtərəl /

adjective

  1. consisting of one letter

"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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The most important phonograms are the uniliteral or alphabetic signs, twenty-four in number in the Old Kingdom and without any homophones: later these were increased by homophones to thirty.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" by Various

Thus, like them, he distinguishes triliteral, biliteral, and even uniliteral roots; but contrary to them, he maintains that contracted and quiescent verbs are triliteral and not biliteral.

From Rashi by Szold, Adele