Without enamel; lacking an enamel coating or finish.
From enamel + -less (without). The -less suffix is Old English in origin, combining with nouns to indicate absence or lack of that thing. Used in technical contexts to describe uncoated or unfinished surfaces.
In dentistry, 'enamelless' teeth exposed to acids will decay much faster than protected ones—which is why brushing is crucial, because tooth enamel is the hardest substance your body produces but can't repair itself.
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