parallactic inequality
noun
An inequality in the moon's orbit caused by the gravitational attraction of the sun, in which the moon in its first quarter is ahead of its position as calculated assuming uniform motion, and in its last quarter lags behind the calculated position.
Origin
Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London.
- presenter
- presential
- presentiality
- presentially
- presentiate
- presentiation
- presentic
- presentient
- presentiment
- presentimental
- present imperfect
- presentism
- presentist
- presentive
- presently
- presentment
- presentness
- presentoir
- presentoire
- presentor
- present participle
- present perfect
- present stem
- present tense
- present-time