Meaning of sesquitertia | Babel Free

Definitions

1. A ratio of 4 to 3.
   countable, obsolete, uncountable
2. A perfect fourth, an interval having the ratio of 1 to 1⅓, or 3 to 4.
   countable, obsolete, uncountable

Examples

“For, what proportion, 100 hath to 75: the same hath 17 1/7 to 12 6/7: Which is Sesquitertia: that is, as 4, to 3. which make 7.”

CEFR level