LATIN DICTIONARYLexicon Latīnum
noun · femininethird declension

pectiō

pectiō f (genitive pectiōnis)
Classical[ˈpɛk.ti.oː]Ecclesiastical[ˈpɛk.t͡si.o]

Meaning

  1. the action of combing, a combing of the hair
    item adiutoria localia, ut exempli causa, primo capillos decurramus ex pectione, nunc pro capillatura, nunc contra capillaturam Also local aids, for example, first we run through the hair from combing, now with the hair, now against the hairc. 420 CE, Caelius Aurelianus, Tardarum passionum 1.4.98

Declension

declension
formsingularplural
nominativepectiōpectiōnēs
genitivepectiōnispectiōnum
dativepectiōnīpectiōnibus
accusativepectiōnempectiōnēs
ablativepectiōnepectiōnibus
vocativepectiōpectiōnēs

pectĭo, ōnis, f. pecto,
I. a combing of the hair, Cael. Aur. Tard. 1, 4, 98.

Origins

Apparently an abstract noun built on pectō (“to comb”), although the formation is unusual: most comparable nouns are formed with the suffix -tiō (or equivalently, are built on the supine stem of the verb), which would yield *pexiō. If genuine, the word might be formed with the less common abstract noun suffix -iō; alternatively, as noted below, "pectione" could be a corruption of the original text.

Quick answers

What does pectiō mean in Latin?
pectiō, a noun, means “the action of combing, a combing of the hair”.
What is the genitive of pectiō?
The genitive singular is pectiōnis. pectiō is feminine, third declension.
How do you pronounce pectiō?
In classical Latin, [ˈpɛk.ti.oː]; in ecclesiastical (church) Latin, [ˈpɛk.t͡si.o].