прилагательное бифокальный, двухфокусный Например: bifocal spectacles — бифокальные очки
бифокальный, двухфокусный
I. adjective Etymology: International Scientific Vocabulary 1. having two focal lengths 2. having one part that corrects for near vision and one for distant vision Example: a bifocal eyeglass lens II. noun 1. plural eyeglasses with bifocal lenses 2. a bifocal glass or lens