Synset

(plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision
<noun.artifact> freq. cnt.: 5 freq. cnt.: 4 freq. cnt.: 1

semantic pointers

hyponym

bifocals goggles lorgnette pince-nez sunglasses, dark glasses, shades

part meronym

bridge, nosepiece

part holonym

hypernym

optical instrument

domain of synset (usage)

plural, plural form