calcareus

calx (“chalk”) +‎ -āreus

• (Classical) IPA^(key): /kalˈkaː.re.us/, [käɫ̪ˈkäːreʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /kalˈka.re.us/, [kälˈkäːreus]

calcāreus (feminine calcārea, neuter calcāreum); first/second-declension adjective

1. (New Latin) chalky (as a botanical epithet)

• Used almost exclusively as a taxonomic epithet and thus not normally in inflected forms other than the nominative singular.
• The Classical Latin form with the same meaning is calcārius. The form ending in -eus is a misspelling that has become established as a taxonomic epithet.

First/second-declension adjective.