Atwood’s machine
a device consisting of two unequal m-sses connected by a string p-ssed over a pulley, used to ill-strate the laws of motion.
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- Atypical lipoma
atypical lipoma atypical lipoma n. a benign lipoma occurring primarily in older men on the posterior neck, shoulders, and back, and containing multinucleated giant cells. also called pleomorphic lipoma.
- Atypical measles
atypical measles atypical measles n. a severe form of measles caused by natural infection with the measles virus in persons whose immunity by vaccination is diminished; it is characterized by high fever, atypical rash, and pneumonia.
- Atypical pneumonia
atypical pneumonia atypical pneumonia n. see primary atypical pneumonia.
- Atypical verrucous endocarditis
atypical verrucous endocarditis atypical verrucous endocarditis n. see libman-sacks endocarditis.
- Atypicalities
not ; not conforming to the type; irregular; abnormal: atypical behavior; a flower atypical of the species. adjective not typical; deviating from or not conforming to type adj. 1847, from a- (2) “not” + typical. related: atypically. atypical a·typ·i·cal (ā-tĭp’ĭ-kəl) adj. not corresponding to the normal form or type; not typical. a·typ’i·cal·ly adv.