A lot vs. Alot: 9 Grammatical Pitfalls
Two; twice; double: dichromatic.
Containing two atoms, radicals, or groups: diiodide.
A prefix that means "two," "twice," or "double." It is used commonly in chemistry, as in dioxide, a compound having two oxygen atoms.
A drill instructor; noncommissioned officer in charge of recruits (1913+ Marine Corps)
in music, transverse (or side-blown) bamboo flute of the Han Chinese. Traditional di have a membrane of bamboo or reed tissue covering the hole that is located between the mouth hole and the six finger holes. This membrane creates a distinctive sound characteristic of much Chinese flute music. An additional two or more end holes aid in the expulsion of air and are sometimes used to attach decorative silk tassles. Di have a two-octave range, and complete modern sets can be purchased in Western tunings. There are many varieties of traditional lengths and construction