t-lymphocytopenia, idiopathic CD4-positive (medicine) and orchestra (medicine)

t-lymphocytopenia, idiopathic CD4-positive (medicine)

t-lymphocytopenia, idiopathic CD4-positive

Reproducible depletion of CD4+ lymphocytes below 300 per cubic millimeter in the absence of HIV infection or Other known causes of immunodeficiency. This is a rare, heterogeneous syndrome and does not appear to be caused by a transmissible agent.

orchestra (medicine)

orchestra

1. The space in a Theater between the stage and the audience; originally appropriated by the Greeks to the chorus and its evolutions, afterward by the Romans to persons of distinction, and by the moderns to a band of instrumental musicians.

2. The place in any public hall appropriated to a band of instrumental musicians.

3. Loosely: A band of instrumental musicians performing in a Theater, concert hall, or Other place of public amusement. Strictly: A band suitable for the performance of symphonies, overtures, etc, as well as for the accompaniment of operas, oratorios, cantatas, masses, and the like, or of vocal and instrumental solos.

A band composed, for the largest part, of players of the various viol instruments, many of each kind, together with a proper complement of wind instruments of wood and brass; as distinguished from a military or street band of players on wind instruments, and from an assemblage of solo players for the rendering of concerted pieces, such as septets, octets, and the like.

4. The instruments employed by a full band, collectively; as, an orchestra of forty stringed instruments, with proper complement of wind instruments.

Origin: L. Orchestra, Gr, orig, the place for the chorus of dancers, from to Dance: cf. F. Orchestre.

Source: Websters Dictionary

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