Bi-septile Definition of Bi-septile: A minor hard aspect, separating distance roughly 103° (102° 51′ 26″), based on the seventh harmonic (multiples of a septile, 51 3⁄7°, which is 1⁄7 of 360°). Your thoughts are welcome: Cancel replyYour email address will not be published.Comment Name * Email * Email me when new comments are added.