X Please select a letter below for horse and farrier glossary terms. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z X-RAYSElectromagnetic radiation with wave lengths between approximately 0.0000001 and 0.00000000001 centimeter. Because X-rays pass through soft tissue and are largely absorbed by bones, they are useful in radiography. a.k.a: Roentgen rays. Request Information Your Name (required) Your Email (required) Subject Your Message