| A | B |
| compression | to exert force against |
| conjunction | meeting; a word that connects |
| electromagnetic radiation | rays produced by the collision of a beam of electrons with a metal target in an x-ray tube |
| electron | a minute particle of matter charged with the smallest known amount of negative electricity; opposite of proton |
| evacuate | to empty, especially the bowels |
| flatus | intestinal gas |
| iodine | a nonmetallic element belonging to the halogen group |
| lesion | an injury or wound; a circumscribed area of pathologically altered tissue |
| residual barium | barium remaining in the intestinal tract following evacuation at the completion of x-ray studies |
| retrograde | refers to an x-ray procedure in which a radiopaque material is instilled by catheter into the bladder, ureters, and kidneys |
| roentgen | refers to x-rays |
| therapeutic | having medicinal or healing properties; pertaining to results obtained from treatment |