Improvisation :: Improvisation (n.) The act or art of composing and rendering music, poetry, and the like, extemporaneously; as, improvisation on the organ..
Improvisation :: Improvisation (n.) That which is improvised; an impromptu.
Isatide :: Isatide (n.) A white crystalline substance obtained by the partial reduction of isatin.
Isatin :: Isatin (n.) 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..
Isatinic :: Isatinic (a.) Pertaining to, or derived from, isatin; as, isatic acid, which is also called trioxindol..
Isatis :: Isatis (n.) A genus of herbs, some species of which, especially the Isatis tinctoria, yield a blue dye similar to indigo; woad..