‖ [ L., one half more, one and a half. ] (Chem.) A combining form (also used adjectively) denoting that three atoms or equivalents of the substance to the name of which it is prefixed are combined with two of some other element or radical;
☞ Sesquidupli- is sometimes, but rarely, used in the same manner to denote the proportions of two and a half to one, or rather of five to two. [ 1913 Webster ]
a. Sesquialteral. [ 1913 Webster ]
Sesquialteral ratio (Math.),
a. Sesquialteral. [ 1913 Webster ]
a. [ Sesqui- + basic. ] (Chem.) Containing, or acting as, a base in the proportions of a sesqui compound. [ 1913 Webster ]
a. [ Sesqui- + duplicate. ] Twice and a half as great (as another thing); having the ratio of two and a half to one. [ 1913 Webster ]
Sesquiduplicate ratio (Math.),
n. [ Sesqui- + oxide. ] (Chem.) An oxide containing three atoms of oxygen with two atoms (or radicals) of some other substance;
[ 1913 Webster ]
n.
a. [ Sesqui- + plicate. ] (Math.) Subduplicate of the triplicate; -- a term applied to ratios; thus, a and a′ are in the sesquiplicate ratio of b and b′, when a is to a′ as the square root of the cube of b is to the square root of the cube of b′, or
The periodic times of the planets are in the sesquiplicate ratio of their mean distances. Sir I. Newton. [ 1913 Webster ]
n. [ Sesqui- + salt. ] (Chem.) A salt derived from a sesquioxide base, or made up on the proportions of a sesqui compound. [ 1913 Webster ]
n. [ Sesqui- + sulphide. ] (Chem.) A sulphide, analogous to a sesquioxide, containing three atoms of sulphur to two of the other ingredient; -- formerly called also
a. Sesquitertian. [ 1913 Webster ]
n. [ Sesqui- + tone. ] (Mus.) A minor third, or interval of three semitones. [ 1913 Webster ]
[ Pref. sub- + sesqui-. ] (Chem.) A prefix (also used adjectively) denoting the combination of constituents (especially electro-negative and electro-positive bodies) in the proportion of two to three;