echo-, ech-
(Greek: sound, noise; especially a returned sound; repetition, imitation)
anecho
anechoic (adjective), more anechoic, most anechoic
Relating to being without echoes: The scientist was experimenting with the absorption of sound waves and radar signals in a special anechoic chamber.
catecheses (plural)
catechesis (singular)
catechetical
catechism
catechist
catechization
catechize
catechizing
catechumen
echo
A hearing defect in which sounds bounce and are repeated instead of being perceived as normally heard sounds: Manfred found that the echoacousia which he was experiencing was very distracting, especially when he was trying to listen to music, his TV, or what people were saying to him.
echocardiogram
1. A medical test which uses high-frequency sound waves to image the heart and surrounding tissues.
2. An image of the heart produced by ultrasonography or a test that uses sound waves to create a moving picture of the heart.
2. An image of the heart produced by ultrasonography or a test that uses sound waves to create a moving picture of the heart.
The picture is much more detailed than x-ray images and involves no radiation exposure.
echocardiograph
An ultrasound device used to examine the working heart and display moving images of its action.
