Accadian

adj. of Accad or its inhabitants; of Accadian, of the language spoken in Accad

n. resident of Accad (northern division of ancient Babylonia)

n. Semitic language of ancient Assyria and Babylonia (also Akkadian)

Akkadian (lišānum akkadītum) was a Semitic language (part of the greater Afro-Asiatic language family) spoken in ancient Mesopotamia, particularly by the Assyrians and Babylonians (also called Assyro-Babylonian). The earliest attested Semitic language, it used the cuneiform writing system derived ultimately from ancient Sumerian, an unrelated, language isolate. The name of the language is derived from the city of Akkad, a major center of Mesopotamian civilization.
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n. Accadian, language of ancient Babylonia, Sumerian

(a.)
Pertaining to a race supposed to have lived in Babylonia before the Assyrian conquest.