(mō-dăl'ĭt-ē )

1. method of application or the employment of any therapeutic agent, device, or treatment.
2. Any specific sensory stimulus such as taste, touch, vision, pressure, or hearing.

physical agent m.A form of therapy used in rehabilitation that produces a change in soft tissue through light, water, temperature, sound, or electricity. It includes transcutaneous electrical nerve stimulation units, ultrasound, whirlpool, hot and cold packs, and other medical devices.