aestuarium

From aestus (“tide”) +‎ -ārium (“place for”).

• (Classical Latin) IPA^(key): /ae̯s.tuˈaː.ri.um/, [äe̯s̠t̪uˈäːriʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /es.tuˈa.ri.um/, [est̪uˈäːrium]

aestuārium n (genitive aestuāriī or aestuārī); second declension

1. tidal marsh or opening
2. creek
3. estuary of a river
4. air shaft of a mine

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

• “aestuarium”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “aestuarium”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• aestuarium in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• aestuarium in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.