Selective Imidazoline Receptor Agonist

The Sira is the traditional life of Muhammad.

Sira was a group of British engineering companies, based in south London, that designed test equipment and provided calibration services. It began life as the British Scientific Instrument Research Association (BSIRA) in 1918.

Silkwood International Reiki Association

Any tubular vessel in the body - a vein, nerve or artery.