LBD is a an umbrella term for two related clinical diagnoses, dementia with Lewy bodies and Parkinson's disease dementia. The latest clinical diagnostic criteria for dementia with Lewy bodies (DLB) categorizes symptoms into three types, listed below. A diagnosis of Parkinsons' disease dementia (PDD) requires a well established diagnosis of Parkinson's disease that later progresses into dementia, along with very similar features to DLB.
The meaning of LBF is: Later, best friend . Find more definitions for LBF on Slang.org!
Pound-mass and slug-force were introduced a few years ago in an attempt to keep the ancient idiotic system alive. The pound mass, lbm, is a mass which has a weight of one pound force, lbf, in a gravity field of 32 ft/s^2 (standard Earth gravity). As long as your are only dealing with standard Earth gravity, use the conversion factors 32 lbm = 1 slug & 1 slug times g = 32 lbf.