The difference between Cold-blooded and Reptilian
When used as adjectives, cold-blooded means having an unregulated body temperature, whereas reptilian means of or relating to the members of the class reptilia.
Reptilian is also noun with the meaning: a reptilian animal: a reptile.
check bellow for the other definitions of Cold-blooded and Reptilian
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Cold-blooded as an adjective:
Having an unregulated body temperature; ectothermic.
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Cold-blooded as an adjective:
Lacking emotion or compunction.
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Reptilian as an adjective (zoology):
Of or relating to the members of the class Reptilia.
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Reptilian as an adjective:
Reptilelike.
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Reptilian as an adjective (figuratively):
Unthinking, low, base, contemptible.
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Reptilian as an adjective (figuratively):
Cold-blooded, treacherous, unavoidably selfish and hostile.
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Reptilian as a noun:
A reptilian animal: a reptile.
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Reptilian as a noun (figuratively):
A reptilian person, especially a Jew.
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Reptilian as a noun (science fiction):
A reptilian alien, especially of a shapeshifting race purported to secretly control the world.