Without hair; hairless or smooth-skinned.
From Latin 'de-' (without) + 'pilus' (hair) + '-ous' (full of, characterized by). This descriptive term emerged in English medical and botanical contexts to describe hairless organisms or body parts.
Dolphins and whales are depilous mammals—they lost all their body hair during evolution because living in water made hair pointless, which is why they never needed depilatories!
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