meridian mark
Astronomy
noun
A mark fixed due north or due south of an astronomical instrument, by means of which the instrument is aligned with the local meridian.
Origin
Mid 19th century; earliest use found in John Herschel (1792–1871), mathematician and astronomer.
- audibleness
- audibly
- audience
- audience appeal
- audience chamber
- Audience Court
- audience-friendly
- audience involvement
- audience participation
- audiencer
- audience rating
- audience research
- audience researcher
- audiencier
- audient
- audiently
- audile
- auding
- audio
- audio-
- audio-active
- audio amplifier
- audio-animatron
- Audio-Animatronic
- Audio-Animatronics