A commercial aircraft that flies faster than the speed of sound; SST stands for supersonic transport. The Concorde, developed by the British and French, is an example of an SST.
sea surface temperature
spectroscopic survey telescope
abbreviation 1. Scottish Secondary Teachers’ Association SSTA sea surface temperature anomaly
noun, Astronomy. 1. a relatively cool red giant having a surface temperature of about 2500 K and an absorption spectrum with strong lines of zirconium oxide.
SSTT small satellite thermal technologies
SSU stratospheric sounding unit