The term "white pulp" refers to a part of the immune system found in the spleen. It contains white blood cells that help fight off infections and diseases. Full definition
The most widely available and most popular variety of the fruit is the one with white pulp and black seeds. (alivebynature.com)
Other varieties have red pulp with black seeds, or have yellow skin but still white pulp and black seeds. (alivebynature.com)
splenic white pulp contains follicles that are larger and more irregular in shape than normal follicles and are often fused with adjacent follicles (jax.org)