Meaning

noun broken stone used in macadamized roadways

noun a paved surface having compressed layers of broken rocks held together with tar

originEtymology tree Proto-Celtic *makkʷos Primitive Irish ᚋᚐᚊᚊᚔ (maqqi) Old Irish macc Middle Irish mac Scottish Gaelic mac Proto-Semitic *ʔadam- Hebrew אָדָםbor. Ancient Greek Ἀδάμ (Adám)bor. Latin Ādāmder. Old Irish Ádam Scottish Gaelic Àdhamh Scottish Gaelic Mac Àdhaimhder. English MacAdam Derived from Scottish Gaelic Mac Àdhaimh (“Adam's son”).

Etymology from Wiktionary, CC BY-SA 3.0