Adductor muscle: Any muscle that pulls a body part toward the midline. For example, the adductor muscles of the legs pull the legs toward the midline of the body so the legs are closer together.
The word “adductor” comes from the Latin prefix “ad” meaning “toward” + “ducere” meaning “to draw or lead” = “to draw toward.” The opposite of “adductor” is “abductor.” An adductor muscle opposes an abductor muscle.
- Adenine (A)
Adenine (A): One member of the A-T (adenine-thymine) base pair in DNA. The other base pair in DNA is G-C (guanine-cytosine).
Adenitis: Inflammation of a lymph gland. From the aden-, gland + -itis, inflammation.
Adeno-: Prefix referring to a gland, as in adenoma and adenopathy. From the Greek aden meaning originally “an acorn” and later “a gland” in the form of an acorn. Before a vowel, adeno- becomes aden-, as in adenitis (inflammation of a gland).
Adenocarcinoma: A cancer that develops in the lining or inner surface of an organ and usually has glandular (secretory) properties. More than 95 percent of prostate cancers are adenocarcinomas.
- Adenoid cystic carcinoma
Adenoid cystic carcinoma: A type of cancer that most often develops in the salivary glands of the head and neck. It may arise in other sites such as the skin, lacrimal gland, trachea, breast, cervix and prostate. Adenoid cystic carcinoma (ACC) has a characteristic appearance under the microscope. Abnormal “nests” or cords of certain cells […]