| extended clasp | A clasp that extends from its minor connector along the lingual and/or facial surface of two or more teeth. (05 Mar 2000) |
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| extended family | A group of persons comprising members of several generations united by blood, adoptive, marital or equivalent ties. (05 Mar 2000) |
| extended family therapy | A type of family therapy that involves family members outside the nuclear family and who are closely associated with it and affect it. (05 Mar 2000) |
| extended insulin zinc suspension | A long-acting insulin suspension, obtained from beef, with an approximate time of onset of 7 hours and a duration of action of 36 hours. Synonym: crystalline insulin zinc suspension. (05 Mar 2000) |
| extended pyelotomy | Extension of a standard pyelotomy into the lower pole infundibulum through the avascular plane between the posterior and basilar segmental renal arteries. Synonym: Gil-Vernet operation. (05 Mar 2000) |
| extended radical mastectomy | Excision of the entire breast including the nipple, areola, and overlying skin, as well as the pectoral muscles and the lymphatic-bearing tissues of the axilla and chest wall and internal mammary chain of lymph nodes. (05 Mar 2000) |
| mastectomy, extended radical | Radical mastectomy with removal of the ipsilateral half of the sternum and a portion of ribs two through five with the underlying pleura and the internal mammary lymph nodes. (12 Dec 1998) |
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| contact lenses, extended-wear | Hydrophilic contact lenses worn for an extended period or permanently. (12 Dec 1998) |