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1. Chemistry
a. A system in which finely divided particles, which are approximately 1 to 1,000 millimicrons in size, are dispersed within a continuous medium in a manner that prevents them from being filtered easily or settled rapidly.
b. The particulate matter so dispersed.
2. The gelatinous stored secretion of the thyroid gland, consisting mainly of thyroglobulin.
3. Gelatinous material resulting from degeneration in diseased tissue.
Of, relating to, containing, or having the nature of a colloid.

col·loi′dal (kə-loid′l, kŏ-) adj.
col·loi′dal·ly adv.


(Chemistry) of, denoting, or having the character of a colloid
colloidality n


(kəˈlɔɪd l)

pertaining to or of the nature of a colloid: colloidal gold and silver.
col•loi•dal•i•ty (ˌkɒl ɔɪˈdæl ɪ ti) n.
col•loi′dal•ly, adv.
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Adj.1.colloidal - of or relating to or having the properties of a colloid
References in periodicals archive ?
Histopathological examination of thyroid gland confirmed presence of colloidal goiter (Fig.
All the cases were of a colloidal goiter apart of one case of auto immune thyroiditis.
We believe that the colloidal goiter in this goat is due to the action of 3,4-DHP that interferes in the intracellular process of iodine oxidation of the thyroid gland, which results in accumulation of colloid poor in thyroglobulines, decrease of thyroxin (JONES, 1985), myxedema, skin alterations and follicular atrophy.