Defn: A figure or polygon whose angles are equal.
ISAPOSTOLIC
Is*ap`os*tol"ic, a. Etym: [Gr.
Defn: Having equal, or almost equal, authority with the apostles of their teachings.
ISATIC; ISATINIC
I*sat"ic, I`sa*tin"ic, a. (Chem.)
Defn: Pertaining to, or derived from, isatin; as, isatic acid, which is also called trioxindol.
ISATIDE
I"sa*tide, n. (Chem.)
Defn: A white crystalline substance obtained by the partial reduction of isatin. [Written also isatyde.]
ISATIN
I"sa*tin, n. Etym: [See Isatis.] (Chem.)
Defn: An orange-red crystalline substance, C8H5NO2, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo. [Written also, less properly, isatine.]
ISATIS
I"sa*tis, n. Etym: [L., a kind of plant, Gr. (Bot.)