VALVE n.
k, etc. -- Double-beat valve, a kind of balance valve usually consisting of a movable, open-ended, turban-shaped shell provided with two faces of nearly equal diameters, one above another, which rest upon two corresponding seats when the valve is closed. -- Equilibrium valve. (a) A balance valve. See under Balance. (…
VANADIUM n.
A rare element of the nitrogen-phosphorus group, found combined, in vanadates, in certain minerals, and reduced as an infusible, grayish-white metallic powder. It is intermediate between the metals and the non-metals, having both basic and acid properties. Sumbol V (or Vd, rarely). Atomic weight 51.2.…
WIDGEON n.
ldpate, baldface, baldcrown, smoking duck, wheat, duck, and whitebelly. Bald-faced, or Green-headed, widgeon, the American widgeon. -- Black widgeon, the European tufted duck. -- Gray widgeon. (a) The gadwall. (b) The pintail duck. -- Great headed widgeon, the poachard. -- Pied widgeon. (a) The poachard. (b) The go…
WINTER n.
e dunlin. -- Winter solstice. (Astron.) See Solstice, 2. -- Winter teal (Zoöl.), the green-winged teal. -- Winter wagtail (Zoöl.), the gray wagtail (Motacilla melanope). [Prov. Eng.] -- Winter wheat, wheat sown in autumn, which lives during the winter, and ripens in the following summer. -- Winter wren (Zoöl.), a s…