13-letter words containing d, a, y, c, o
- velocity head — the velocity of a fluid expressed in terms of the head or static pressure required to produce that velocity. It equals ρν/2 where ρ is the density of the fluid and ν is the velocity. In hydrology the density of water can be written 1/G where G is the gravitational constant
- victory medal — a round bronze medal awarded to all those who served in the armed forces of the U.S. during World War I.
- vindicatorily — in a vindicatory manner
- wood hyacinth — bluebell (def 2).
- zygodactylous — Also, zygodactylous. (of a bird) having the toes of each foot arranged in pairs, with two toes in front and two behind.