different between dewclaw vs dewlap

English

Uncertain first element + claw. Compare dewlap.

dewclaw (plural dewclaws)

Dew, of unknown meaning and origin, + Old English læppa (“a loose hanging piece”)

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

dewlap (plural dewlaps)

The pendulous skin under the neck of an ox, or a similar feature on any other animal.
- 1901 – 1902, Arthur Conan Doyle, The Hound of the Baskervilles
  Fire burst from its open mouth, its eyes glowed with a smouldering glare, its muzzle and hackles and dewlap were outlined in flickering flame.
The sagging flesh on the human throat of an old person.
- 2017, Bernard MacLaverty, novel, 'Midwinter Break', Chapter 2, at p.36:
  He ended up looking at himself in the mirror. His image stared back at him. He was developing a dewlap - a definite dewlap. He waggled under his chin scornfully with his fingers.

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