Caviare, the roe (the immature ovaries) of the common sturgeon and other kindred fishes, caught chiefly in the Black and Caspian Seas, and prepared and salted; deemed a great luxury by those who have acquired the taste for it; largely imported from Astrakhan.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Cavendish, William * Cavour, Count Camillo Benso de