(pathology) Initialism of spread through air spaces.

Abbreviation of station.

(Australia, South Australia, obsolete) Initialism of State Transport Authority () / (Australia, New South Wales) Initialism of State Transit Authority ()

(algebra) Abbreviation of spacetime algebra (in mathematical physics) / (biology) Initialism of Spike-Triggered Average (a tool for characterizing the response properties of a neuron)

station / (geography) Abbreviation of Santa (“saint”).

Santa

(geography) Abbreviation of Santa (“saint”). / Alternative form of Sta (abbreviation)

Abbreviation of Santa Clara.

Abbreviation of Santa Barbara.

(pathology) A slackening or arrest of the blood current, due not to a lessening of the heart’s beat, but to some abnormal resistance of the capillary walls.