D.
Dew, n. The moisture of the air when condensed on any cold surface. Dew does not fall; it is formed wherever moisture in the air comes in contact with a substance colder than the air. Hence there may be dew on the under as well as the upper side of a leaf.
Dissolve, v. L. dis, apart, solvere, loose; to separate the solid particles of a body in a liquid; to melt. Sugar dissolves in water.
Double flowers, n. All those whose petals are numerous. Sometimes the stamens are changed into petals, as in double roses, and sometimes even the pistils have become petals.