yodo

yodo.

(Del gr. ἰώδης, violado).

1. m. Elemento químico de núm. atóm. 53. Relativamente escaso en la corteza terrestre, se encuentra principalmente en el nitrato de Chile, en el agua del mar, concentrado en ciertas algas marinas y forma parte de la estructura de las hormonas tiroideas. De color azul violeta y muy reactivo, se sublima fácilmente, desprendiendo vapores azules y olor penetrante; se usa como colorante, como reactivo en química y fotografía, y en medicina como desinfectante. (Símb. I).
Fuente: Diccionario de la Real Academia Española

Note: Iodine was formerly obtained from the ashes of seaweed (kelp or varec), but is now also extracted from certain
natural brines. In the free state, iodine, even in very
minute quantities, colors starch blue. Iodine and its
compounds are largely used in medicine (as in
liniments, antisyphilitics, etc.), in photography, in
the preparation of aniline dyes, and as an indicator in
titration.
[1913 Webster]

Iodine green, an artificial green dyestuff, consisting of an iodine derivative of rosaniline; -- called also {night
green}.

Iodine scarlet, a pigment of an intense scarlet color, consisting of mercuric iodide.

Iodine yellow, a brilliant yellow pigment, consisting of plumbic iodide.
[1913 Webster]

Source: The Collaborative International Dictionary of English