(UK) Abbreviation of senior; a title used after a father's name when his son is given the same name.

(electronics, communication, mathematics) signal-to-noise ratio / (astronomy) supernova remnant

plural of SNR

Initialism of serotonin and norepinephrine reuptake inhibitor.

(uncountable) Small nuclear RNA (ribonucleic acid). / (countable) A molecule (strand) thereof.

plural of snRNA

plural of snRNP

small nuclear ribonucleic particle

plural of SNRI

plural of snrna