IMIDO a.
Pertaining to, containing, or combined with, the radical NH, which is called the imido group. Imido acid, an organic acid, consisting of one or more acid radicals so united with the imido group that it contains replaceable acid hydrogen, and plays the part of an acid; as, uric acid, succinimide, etc., are imido acids.…
IODINE n.
A nonmetallic element, of the halogen group, occurring always in combination, as in the iodides. When isolated it is in the form of dark gray metallic scales, resembling plumbago, soft but brittle, and emitting a chlorinelike odor. Symbol I. Atomic weight 126.5. If heated, iodine volatilizes in beautiful violet vapors.…
IRIDIUM n.
A rare metallic element, of the same group as platinum, which it much resembles, being silver-white, but harder, and brittle, and indifferent to most corrosive agents. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.5.
ISOLOGOUS a.
tions, similar relations, or similar differences of composition; -- said specifically of groups or series which differ by a constant difference; as, ethane, ethylene, an acetylene, or their analogous compounds, form an isologous series.
ITALIC a.
tes of Italy by the inventor, Aldus Manutius, about the year 1500. Italic languages, the group or family of languages of ancient Italy. -- Italic order (Arch.), the composite order. See Composite. -- Italic school, a term given to the Pythagorean and Eleatic philosophers, from the country where their doctrines were f…