LATIN DICTIONARYLexicon Latīnum
proper nounfirst declension

Dominica in Albīs

Dominica in Albīs f (genitive Dominicae in Albīs)

Meaning

  1. EcclesiasticalLatinWhite Sunday, the Sunday after Easter
    Unde etiam in Missa Dominicae in Albis legitur propter neophytos illud ex epistola Petri: Quasi modo geniti infantes lac concupiscite.On this account, furthermore, in the mass for White Sunday the following is read for the neophytes from the epistle of Peter: “Yearn for milk like newborn babes.”1588, Robert Bellarmine, De Baptismo et Confirmatione [On Baptism and Confirmation], book 1, chapter 27:

Declension

declension
formsingularplural
nominativeDominica in AlbīsDominicae in Albīs
genitiveDominicae in AlbīsDominicārum in Albīs
dativeDominicae in AlbīsDominicīs in Albīs
accusativeDominicam in AlbīsDominicās in Albīs
ablativeDominicā in AlbīsDominicīs in Albīs
vocativeDominica in AlbīsDominicae in Albīs

Origins

Ellipsis of Dominica in Albīs dēpōnendīs or dēpositīs, “Sunday for putting away the white things”, i.e. the white robe of baptism traditionally received by those newly baptised at Easter.

Quick answers

What does Dominica in Albīs mean in Latin?
Dominica in Albīs, a proper noun, means “White Sunday, the Sunday after Easter”.
What is the genitive of Dominica in Albīs?
The genitive singular is Dominicae in Albīs. Dominica in Albīs is first declension.