ultrasonic

The definition of ultrasonic, also known as ultrasound, is sound waves that have a higher frequency than the human ear can hear.

(noun)

An example of ultrasonic is an ultrasound image of an unborn baby
An example of ultrasonic is a dog whistle that cannot be heard by humans,
An example of ultrasonic is the detection of ships and objects underwater by bouncing a high frequency sound wave off their hulls, a process discovered by Paul Langevin, a Frenchman.

See ultrasonic in Webster's New World College Dictionary

adjective

designating or of a frequency of mechanical vibrations above the range audible to the human ear, i.e., above 20,000 vibrations per second

Origin: ultra- + sonic

Related Forms:

See ultrasonic in American Heritage Dictionary 4

adjective

Of or relating to acoustic frequencies above the range audible to the human ear, or above approximately 20,000 hertz.
Of, relating to, or involving ultrasound.

Related Forms: