Definition of ds:
(adj) :
(biochemistry) Abbreviation of double-stranded. [Having two strands.]
(n) :
(medicine) Initialism of Down syndrome. [(neurology, medical genetics) A genetic disorder caused by the presence of all or part of a third copy of chromosome 21 (a chromosomal excess), whereby the patients typically have a delay in cognitive ability and physical growth, as well as a small head and tilted eyelids.]
(adj) :
(pathology) Initialism of drug susceptible or drug sensitive.
(n) :
(medicine, usually used attributively) Initialism of double strength.
(n) :
(law enforcement) Initialism of detective sergeant; a police rank used in Commonwealth countries.
(n) :
(video games) Clipping of Nintendo DS.