1. Imitation; said of a disease or symptom that resembles another, or of the feigning of illness as in factitious illness or malingering. 2. In radiation therapy, use of a geometrically similar radiographic system or computer to plan the location of therapy ports. [L. simulatio, fr. simulo, pp. -atus, to imitate, fr. similis, like]
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sim·u·la·tion (sim″u-laґshən) [L. simulatio] 1. an imitation or pretense. 2. the act of counterfeiting a disease; malingering. the mimicking of one disease by another.Medical dictionary. 2011.