1. The infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
   - infrared

Derived forms: infrared frequencies

Type of: frequence, frequency, oftenness

Part of: infrared spectrum

• nonnegative
• nonnomadic
• nonnormative
• nonobjective
• nonobligatory
• nonobservance
• nonobservant
• nonoccurrence
• nonopening
• nonoperational
• nonoscillatory
• nonparallel
• nonparametric
• nonparametric statistic
• nonparametric statistics
• nonparasitic
• nonpareil
• nonparticipant
• nonparticipation
• nonparticulate
• nonparticulate radiation
• nonpartisan
• nonpartisanship
• nonpartizan
• nonpasserine