“aquila”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
“aquila”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
"aquila", 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)
aquila in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
“aquila”, in Harry Thurston Peck, editor (1898), Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
“aquila”, in William Smith, editor (1848), A Dictionary of Greek and Roman Biography and Mythology, London: John Murray
“aquila”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin