A fish or organism resembling or related to sturgeons, particularly extinct or primitive sturgeon-like forms.
From acipenser plus the suffix -oid meaning 'resembling' or 'having the form of,' commonly used for comparing species to ancestral or similar forms.
The -oid suffix is perfect for paleontologists—it lets them describe fossils that are 'almost but not quite' modern species, capturing evolutionary in-between states.
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