- Sesquitertianal
- Sesquitertian Ses`qui*ter"tian, Sesquitertianal Ses`qui*ter"tian*al, a. [Sesqui- + L. tertianus belonging to the third. Cf. {Tertian}.] (Math.) Having the ratio of one and one third to one (as 4 : 3). [1913 Webster]
The Collaborative International Dictionary of English. 2000.