The difference between Cold-blooded and Phlegmatic
When used as adjectives, cold-blooded means having an unregulated body temperature, whereas phlegmatic means not easily excited to action or passion.
Phlegmatic is also noun with the meaning: one who has a phlegmatic disposition.
check bellow for the other definitions of Cold-blooded and Phlegmatic
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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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Phlegmatic as an adjective:
Not easily excited to action or passion; calm; sluggish.
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Phlegmatic as an adjective (archaic):
Abounding in phlegm.
Examples:
"'phlegmatic humors"
"a phlegmatic constitution"
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Phlegmatic as an adjective:
Generating, causing, or full of phlegm.
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Phlegmatic as an adjective:
Watery .
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Phlegmatic as a noun:
One who has a phlegmatic disposition.