LATIN DICTIONARYLexicon Latīnum
adjectivefirst/second-declension adjective

Mediolatīnus

Mediolatīnus (feminine Mediolatīna, neuter Mediolatīnum)
Classical[mɛ.di.ɔ.ɫaˈtiː.nʊs]Ecclesiastical[me.di.o.laˈtiː.nus]

Meaning

  1. adjectiverareMedieval Latin (of or pertaining to the forms of the Latin language written, spoken, and sung during the Middle Ages)
    Quae cum de sermōnis proprietātibus praecēperit Valla, vestīgia tamen syntaxeos Mediolatīnae in eius scrīptīs cernere possumus nōn pauca.2001, Terence Tunberg, “De Marco Antonio Mureto Oratore et Gallo et Romano”, in Gilbert Tournoy, editor, Humanistica Lovaniensia: Journal of Neo-Latin Studies, volume L, Leuven University Press, →ISBN, 306, footnote 7:

Declension

singular
formmasculinefeminineneuter
nominativeMediolatīnusMediolatīnaMediolatīnum
genitiveMediolatīnīMediolatīnaeMediolatīnī
dativeMediolatīnōMediolatīnaeMediolatīnō
accusativeMediolatīnumMediolatīnamMediolatīnum
ablativeMediolatīnōMediolatīnāMediolatīnō
vocativeMediolatīneMediolatīnaMediolatīnum
plural
formmasculinefeminineneuter
nominativeMediolatīnīMediolatīnaeMediolatīna
genitiveMediolatīnōrumMediolatīnārumMediolatīnōrum
dativeMediolatīnīsMediolatīnīsMediolatīnīs
accusativeMediolatīnōsMediolatīnāsMediolatīna
ablativeMediolatīnīsMediolatīnīsMediolatīnīs
vocativeMediolatīnīMediolatīnaeMediolatīna

Origins

Likely calqued on/backported from Italian mediolatino (“Medieval Latin”, adj. and subst.) or another Romance language, and is more in line with Greek than with Latin word-formation models. Analyzable as medius (“middle”) + -o- + Latīnus (“Latin”).

Quick answers

What does Mediolatīnus mean in Latin?
Mediolatīnus, a adjective, means “Medieval Latin (of or pertaining to the forms of the Latin language written, spoken, and sung during the Middle Ages)”.
How do you pronounce Mediolatīnus?
In classical Latin, [mɛ.di.ɔ.ɫaˈtiː.nʊs]; in ecclesiastical (church) Latin, [me.di.o.laˈtiː.nus].