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absorption and incorporation of a substance by living tissue.
biologic uptake movement of hazardous substances from the environment into the tissues of plants or animals.
radioactive iodine uptake (radioiodine uptake) uptake of radioiodine from the blood by the thyroid gland; see radioiodine uptake test.
uptake of radioiodine from the blood by the thyroid gland. See also radioiodine uptake test.