Stratum (pl. strata), a bed or layer.
Subsidence, the act of sinking or gradually descending.
Superciliary, the bony superior arch above the eye-brow.
Suture, the seam which unites the bones of the skull.
Symphysis, a connection of bones without a movable joint.
Talus, a sloping heap of fragments of rocks lying at the foot of a hill.
Tarsal, relating to the ankle.
Temporal, pertaining to that portion of the head located to the front and a little above the ear.
Terra-cotta, a kind of pottery made from fine clay, hardened by heat.
Tertiary, the first period of the age of mammals.