Mole

mole a fleshy mass or tumor formed in the uterus by the degeneration or abnormal development of a zygote.

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hydatid mole , hydatidiform mole an abnormal pregnancy characterized by placental abnormality involving swollen chorionic villi, which form a large, grapelike mass of vesicles, by trophoblastic hyperplasia, and by loss of fetal blood vessels in the villi. It is complete when all villi are swollen and fetal tissues are absent, and partial when only some villi are swollen and fetal tissues are present. Complete moles usually possess only paternal chromosomes; partial moles are usually triploid and possess both maternal and paternal chromosomes.

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mole (mol) the base SI unit of amount of matter, being that amount of substance that contains as many elementary entities as there are carbon atoms in 0.012 kg of carbon 12 (12C), Avogadro's number (6.023 × 1023).

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mole a nevocytic nevus; also, a pigmented fleshy growth or, loosely, any blemish of the skin.

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pigmented mole  see under nevus.

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mole ¹ (ml)

n.

A small congenital growth on the skin, usually slightly raised and dark and sometimes hairy, especially a pigmented nevus. Also called nevus pigmentosus.

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mole ² (ml)

n.

1. A fleshy abnormal mass formed in the uterus by the degeneration or abortive development of an ovum.

2. See hydatidiform mole.

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mole ³ or mol (ml)

n.

1. The amount of a substance that contains as many atoms, molecules, ions, or other elementary units as the number of atoms in 0.012 kilogram of carbon 12. The number is 6.0225 × 10²³, or Avogadro's number. Also called gram molecule.

2. The mass in grams of this amount of a substance, numerically equal to the molecular weight of the substance. Also called gram-molecular weight.

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Mole

A mass of abnormal, partially developed tissues inside the uterus (womb). Moles develop during a pregnancy that begins with an abnormal fertilization.

Mentioned in: Choriocarcinoma

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mole,

n the number of grams of a substance that is equivalent to the molecular weight. A mole of any compound or mixture comprises the same number of atoms or molecules. This number is called Avogadro's number, 6.02 × 10²³.

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mole,

n a pigmented nevus; a benign lesion of melanin.

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mole

1. a fleshy mass formed in the uterus by abortive development of an ovum.

2. the amount of a substance that contains as many elementary entities (atoms, ions, molecules, or free radicals) as there are atoms in 0.4 oz (12 grams) of pure carbon-12, i.e. equivalent to Avogadro's number (6.023 × 10²³) of elementary entities; the amount of a chemical compound having a mass in grams equal to its molecular weight.

3. a fleshy growth caused by a defect in development of the skin; a nevus. The name is also sometimes incorrectly used to describe the tactile hairs and underlying tubercles which are sometimes distinctively pigmented, on either side of the face in dogs.

4. a highly efficient burrowing insectivorous, small mammal in the family Talpidae or Chrysochloridae, with black, velvety fur, and almost blind and deaf.

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hydatid mole, hydatidiform mole

a condition in females characterized by an abnormal pregnancy resulting from a pathological ovum, with proliferation of the epithelial covering of the chorionic villi and dissolution and cystic cavitation of the avascular stroma of the villi. It results in a mass of cysts resembling a bunch of grapes.

pigmented mole

see pigmented nevus.