D VALVE
D" valve`. (Mech.)
Defn: A kind of slide valve. See Slide valve, under Slide.
DVERGR
Dver"gr, n.; pl. Dvergar. Etym: [See Dwarf.] (Scand. Myth.)
Defn: A dwarf supposed to dwell in rocks and hills and to be skillful in working metals.
DWALE Dwale, n. Etym: [OE. dwale, dwole, deception, deadly nightshade, AS. dwala, dwola, error, doubt; akin to E. dull. See Dull, a.]
1. (Bot.)
Defn: The deadly nightshade (Atropa Belladonna), having stupefying qualities.
2. (Her.)
Defn: The tincture sable or black when blazoned according to the fantastic system in which plants are substituted for the tinctures.
3. A sleeping potion; an opiate. Chaucer.