xi-c baryon 
(zīsē, sī-, ksē-)
(zīsē, sī-, ksē-)n.
Either of two subatomic particles in the baryon class, having a charm quark, a neutral or positive charge, masses of 4,834 and 4,826 times that of an electron, and average lifetimes of 3.5 × 10-13 and 9.8 × 10-14 second, respectively. Also called charmed xi baryon.
- Black Nationalism
- Black Nationalist
- black-necked stork
- blackness
- black nightshade
- black oak
- black out
- blackout
- Black Panther
- black pepper
- blackpoll
- Blackpool
- black powder
- Black Power
- black pudding
- black racer
- black raspberry
- black rat
- Black River
- Black Rod
- black rot
- Black Russian
- black salsify
- Blacksburg
- Black Sea