There are two terms referring to the flesh of the fruiting body. Context refers to the flesh as seen with the naked eye, and its most common characteristics are color (original and after bruising) and texture. Trama refers to the flesh as seen under a microscope, and its characters are those of the hyphae that make it up.
This picture shows a cross-section of a gill, with the gill edge at the bottom of the picture and the cap somewhere above the top of the picture. If the gill trama seems to have grown spreading out from the center of the gill (as in the picture), the trama is said to be divergent.