When a massage therapist or business refers to medical massage verses just massage therapy they are generally distinguishing between a deep tissue, injury treatment or sports massage verses a relaxation, swedish or spa massage. The intention of the massage is different.
Calico (in British usage since 1505[1]) is a plain-woven textile made from unbleached and often not fully processed cotton. It may contain unseparated husk parts, for example. The fabric is far less fine than muslin, but less coarse and thick than canvas or denim, but it is still very cheap owing to its unfinished and undyed appearance.
There is also a calico cat breed called a Dilute Calico. Dilute Calicos are not necessarily rare, but they are for sure more rare than the normal calico. They are recognized by their grey, silver, and gold colors instead if the traditional white, black, brown or red patched coat of a calico.