'Solar parallax' definitions:
Definition of 'solar parallax'
(from WordNet)
noun
The angle subtended by the mean equatorial radius of the Earth at a distance of one astronomical unit
Definition of 'Solar parallax'
From: GCIDE
- Solar parallax \Solar parallax\ The parallax of the sun, that is, the angle subtended at the sun by the semidiameter of the earth. It is 8.80'', and is the fundamental datum. [Webster 1913 Suppl.]