1. A unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometres)
   - AU

Derived forms: Astronomical Units

Type of: astronomy unit

Encyclopedia: Astronomical Unit

• black-and-tan
• black-and-tan coonhound
• black-and-tan terrier
• black-backed gull
• black-barred
• black-billed cuckoo
• black-capped chickadee
• black-coated
• black-crowned night heron
• black-eye bean
• black-eyed bean
• black-eyed pea
• black-eyed Susan
• black-eyed Susan vine
• black-footed albatross
• black-footed ferret
• black-fronted bush shrike
• black-gray
• black-grey
• black-haired
• black-headed snake
• black-legged tick
• black-marked
• black-market
• black-necked cobra