Le Böe, Franciscus (François), Dutch physician, anatomist, and physiologist, 1614–1672. See sylvian angle, sylvian aqueduct, sylvian fissure, sylvian line, sylvian point, sylvian valve, sylvian ventricle, fossa of S., vallecula sylvii.
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Syl·vi·us (silґve-əs) Jacobus (Fr. Jacques Dubois), 1478–1555, French physician. Confusion exists as to whether some terms ascribed to Franciscus Sylvius should be ascribed instead to this man, particularly the aqueductus mesencephali and related terms.Medical dictionary. 2011.