1. ((informal) stupid, slow witted or dull) stupid
   - blockheaded, boneheaded, duncical, fatheaded, loggerheaded, thick, thickheaded, thick-skulled, wooden-headed, birdbrained, thick-witted

See also: stupid

• opthalmic
• optic
• optic axis
• optic chiasm
• optic chiasma
• optic cup
• optic disc
• optic disk
• optic nerve
• optic radiation
• optic tract
• optical
• optical aberration
• optical activity
• optical art
• optical bench
• optical character recognition
• optical condenser
• optical crown
• optical crown glass
• optical density
• optical device
• optical disc
• optical disk
• optical fiber