LATIN DICTIONARYLexicon Latīnum
adjectivefirst/second-declension adjective

calcāreus

calcāreus (feminine calcārea, neuter calcāreum)
Classical[kaɫˈkaː.re.ʊs]Ecclesiastical[kalˈkaː.re.us]

Meaning

  1. New Latinadjectivechalky (as a botanical epithet)

Declension

singular
formmasculinefeminineneuter
nominativecalcāreuscalcāreacalcāreum
genitivecalcāreīcalcāreaecalcāreī
dativecalcāreōcalcāreaecalcāreō
accusativecalcāreumcalcāreamcalcāreum
ablativecalcāreōcalcāreācalcāreō
vocativecalcāreecalcāreacalcāreum
plural
formmasculinefeminineneuter
nominativecalcāreīcalcāreaecalcārea
genitivecalcāreōrumcalcāreārumcalcāreōrum
dativecalcāreīscalcāreīscalcāreīs
accusativecalcāreōscalcāreāscalcārea
ablativecalcāreīscalcāreīscalcāreīs
vocativecalcāreīcalcāreaecalcārea

Origins

Misspelling of Classical Latin calcārius (“pertaining to lime”), from calx (“limestone, lime, chalk”) + -ārius. The spelling with -eus could have been influenced by the distinct suffix -eus, or it could simply be a result of the homophony of -ius and -eus in some pronunciation styles.

Quick answers

What does calcāreus mean in Latin?
calcāreus, a adjective, means “chalky (as a botanical epithet)”.
How do you pronounce calcāreus?
In classical Latin, [kaɫˈkaː.re.ʊs]; in ecclesiastical (church) Latin, [kalˈkaː.re.us].