Definitions containing the term double back

What does double back mean?

DI	double immunodiffusion Medical » British Medicine
DID	Double ImmunoDiffusion Medical » Physiology
DN	Double Negative Academic & Science
DV	double vision Medical » British Medicine
PDSNBO	Personal Demographics Service National Back Office Medical » British Medicine
UB	upper back Medical » British Medicine
OPBO	Output Power Back-Off Academic & Science » Electronics
DB	Double-Blind Medical » Laboratory
DBT	double-blind trial Medical
DBB	Double-Block and Bleed Academic & Science » Physics
BD	back door Business » General
DCPI	Double Counts Per Inch Computing » Hardware
DBPCFC	double-blind placebo-controlled food challenges Medical » Laboratory
BRB	Be Right Back Miscellaneous » Gaming
DBST	Double Bituminous Surface Treatment Academic & Science
DWRD	Double Word Computing » Assembly
NSLBP	nonspecific low back pain Medical
BTW	back to work Medical
2B	Double Community » Sports
LMTCB	Left Message To Call Back Computing » Texting
GIDP	Grounded Into Double Play Community » Sports
b/o	back-order(ed) Business » General
HB	hard-back [book] Academic & Science » Libraries
PB	paper-back [book] Academic & Science » Libraries
PB	paper-back [book] Business » General