The act of adding anything.
The arithmetic operation of adding.
A dot at the right side of a note as an indication that its sound is to be lengthened one half.
Anything that is added.
A title annexed to a person's name to identify him or her more precisely.
Something added to a coat of arms, as a mark of honour.
Necessary.
Necessary for survival but not synthesized by the organism, thus needing to be ingested.
Being in the basic form; showing its essence.
Really existing; existent.
Very important; of high importance.
Having the nature of essence; not physical.
Such that each complementary region is irreducible, the boundary of each complementary region is incompressible by disks and monogons in the complementary region, and no leaf is a sphere or a torus bounding a solid torus in the manifold.
Idiopathic.
A necessary ingredient.
A fundamental ingredient.