solar equation

noun

: the correction of the epacts by −1 required in each century of the Gregorian calendar that begins with a common year instead of a leap year compare lunar equation

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now