Resembling or relating to Assyria or Assyrians; having Assyrian characteristics or qualities.
From Assyria or Assyrian + -oid suffix (Greek -oides, resembling or having the form of). The suffix creates adjectives meaning 'like' or 'similar to.'
Words ending in '-oid' often describe things that look like or resemble something else, which is why you get words like 'humanoid' and 'android'—'assyroid' follows the same pattern.
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