1. Without illumination
   "the unilluminated side of Mars"
   - lightless, unlighted, unlit

See also: dark

• horsecloth
• horsefish
• horseflesh
• horsefly
• horsefly weed
• horsehair
• horsehair lichen
• horsehair wig
• horsehead
• horsehide
• horselaugh
• horseleech
• horseless
• horseless carriage
• horseman
• horsemanship
• horsemeat
• horsemint
• horseplay
• horsepond
• horsepower
• horsepower-hour
• horseradish
• horseradish peroxidase
• horseradish root