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Pronunciation varies by accent · noun
The line along the top of the gums, where they meet the surface of the teeth.
Leaving plaque along the gumline leaves gums swollen and inflamed and apt to bleed.
Use gum line when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Gum line means The line along the top of the gums, where they meet the surface of the teeth.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Leaving plaque along the gumline leaves gums swollen and inflamed and apt to bleed.
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