LATIN DICTIONARYLexicon Latīnum
noun · masculinesecond declension

collactāneus

collactāneus m (genitive collactāneī)
Classical[kɔl.lakˈtaː.ne.ʊs]Ecclesiastical[kol.lakˈtaː.ne.us]

Meaning

  1. milk brother
  2. foster brother

Declension

declension
formsingularplural
nominativecollactāneus
conlactāneus		collactāneī
conlactāneī
genitivecollactāneī
conlactāneī		collactāneōrum
conlactāneōrum
dativecollactāneō
conlactāneō		collactāneīs
conlactāneīs
accusativecollactāneum
conlactāneum		collactāneōs
conlactāneōs
ablativecollactāneō
conlactāneō		collactāneīs
conlactāneīs
vocativecollactānee
conlactānee		collactāneī
conlactāneī

col-lactānĕus (conl-), a lacteo,
I. a brother or sister nourished at the same breast, a foster-brother or sister (post-class.); masc., Gai Inst. 1, 39; Dig. 40, 2, 13; Inscr. Orell. 2281 al.; fem., Dig. 34, 4, 30, § 1 al.

Quick answers

What does collactāneus mean in Latin?
collactāneus, a noun, means “milk brother; foster brother”.
What is the genitive of collactāneus?
The genitive singular is collactāneī. collactāneus is masculine, second declension.
How do you pronounce collactāneus?
In classical Latin, [kɔl.lakˈtaː.ne.ʊs]; in ecclesiastical (church) Latin, [kol.lakˈtaː.ne.us].