- Able to be changed - Expendable - Not vital - Capable or admitting of being put back into a place. - Admitting of having its place supplied by a like thing
or an equivalent; as, the lost book is replaceable. - Capable of being replaced (by), or of being exchanged
(for); as, the hydrogen of acids is replaceable by metals or by basic
radicals.
- Two units treated as one; a couple; a pair. - An element, atom, or radical having a valence or combining
power of two. - Having a valence or combining power of two; capable of being
substituted for, combined with, or replaced by, two atoms of hydrogen;
as, oxygen and calcium are dyad elements. See Valence.
- Capable of being neutralized by a univalent base or
basic radical; having but one acid hydrogen atom to be replaced; --
said of acids; as, acetic, nitric, and hydrochloric acids are
monobasic.
- Having a valence of four; capable of combining with,
being replaced by, or compared with, four monad atoms; tetravalent; --
said of certain atoms and radicals; thus, carbon and silicon are
quadrivalent elements.
- Capable of neutralizing, or of combining with, several
molecules of a monacid base; having several hydrogen atoms capable of
being replaced by basic radicals; -- said of certain acids; as,
sulphuric acid is polybasic.
- Capable of neutralizing, or of combining with, several
molecules of a monobasic acid; having more than one hydrogen atom
capable of being replaced by acid radicals; -- said of certain bases;
as, calcium hydrate and glycerin are polyacid bases.