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The Collaborative International Dictionary of English v.0.48 (gcide)

Mucedin \Mu*ce"din\, n. [From {Mucus}.] (Bot. Chem.)
A yellowish white, amorphous, nitrogenous substance found in
wheat, rye, etc., and resembling gluten; -- formerly called
also {mucin}.
[1913 Webster]


Mucin \Mu"cin\ (m[=u]"s[i^]n), n. [From {Mucus}.]
1. (Bot. Chem.) See {Mucedin}. [Obs.]
[1913 Webster]

2. (Physiol. Chem.) Any of a class of high molecular weight
glycoproteins which are contained in mucus, and give to
the latter secretion its peculiar ropy character. They are
found in all the secretions from mucous glands, and also
between the fibers of connective tissue, as in tendons.
They form viscous solutions and serve to provide
lubrication for movement within body cavities, and some
protection of surfaces. See Illust. of {Demilune}.
[1913 Webster PJC]

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