Tarmac

google

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early 20th century: abbreviation of tarmacadam.

wiktionary

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Clipping of tarmacadam, which is tar +‎ macadam (crushed stones). Originally a trademark owned by its inventor Edgar Hooley.

etymonline

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tarmac (n.)

1903, Tarmac, a trademark name, short for tarmacadam (1882) "pavement created by spraying tar over crushed stone," from tar (n.1) + John L. McAdam (see macadam). By 1919, tarmac was being used generally in Great Britain for "runway."