From Longman Dictionary of Contemporary Englishforearmfore‧arm /ˈfɔːrɑːm $ -ɑːrm/ noun [countable] HBHthe lower part of the arm, between the hand and the elbow
Examples from the Corpus
forearm• He seemed all forearms and pectorals and husky silence.• And the only employee I could see was an older guy with tattoos on both forearms who was stocking shelves.• His biceps bulged; the long muscles in his forearm popping.• He has a heart tattooed on his left hand and the initial F on his left forearm.• His reminder of her is the tattoo on his left forearm.• Left forearm rotation is one of the keys to a good takeaway.• He flexed his hand and stroked a talon across his own forearm.• Already your forearms are beginning to ache, and your upper arms crush your ribs. 