dead·bolt 
(dĕdbōlt′)
(dĕdbōlt′)n.
A bolt on a lock that shifts only when the key or a small knob on one side of the lock is turned.
deadbolt- biobased
- biobehavioral
- bio-bibliography
- biobibliography
- biocatalyst
- biocatalytic
- biocenology
- biocenosis
- biochem
- biochemical
- biochemically
- biochemical oxygen demand
- biochemist
- biochemistry
- biochip
- biocidal
- biocide
- bioclimatic
- bioclimatology
- biocoenosis
- biocompatibility
- biocompatible
- biocomputing
- biocontainment
- biocontrol