sext

[sekst] /sɛkst/
noun, Ecclesiastical
1.
the fourth of the seven canonical hours, or the service for it, originally fixed for the sixth hour of the day taken as noon.
Origin
1375-1425; late Middle English sexte, syxt < Medieval Latin sexta (hōra) sixth (hour)
British Dictionary definitions for sext

sext1

/sɛkst/
noun
1.
(mainly RC Church) the fourth of the seven canonical hours of the divine office or the prayers prescribed for it: originally the sixth hour of the day (noon)
Word Origin
C15: from Church Latin sexta hōra the sixth hour

Sext

/sɛkst/
noun
1.
(RC Church) an official compilation of decretals issued by Boniface VIII in 1298 to supplement the five books of the Liber Extra. It forms part of the Corpus Juris Canonici In full Liber Sextus
Word Origin and History for sext
v.

by 2005, from contraction of sex (n.) + text (v.). Related: Sexted; sexting.

n.

early 15c., "third of the lesser canonical hours," from Latin sexta (hora), fem. of sextus, ordinal of sex (see six).