Resembling or related to the cyprinodont fish family in structure or characteristics.
From Cyprinodontidae combined with the suffix -oid, meaning 'resembling or having the form of.' This adjectival form allows for comparison of fish that share cyprinodont characteristics without being classified in the family.
The -oid suffix is a scientist's way of saying 'kind of like this thing'—so cyprinodontoid means a fish might look or act like a cyprinodont even if it's technically from a different family, which is super useful when animals evolve to look similar.
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