del

from The Century Dictionary.

• noun A Middle English form of deal.
• noun An abbreviation of the Latin delineavit, (he) drew it, placed after an artist's name on a picture.
• noun A simplified spelling of dell.
• noun An abbreviation of Delaware;
• noun [lowercase] of delegate.
• noun Same as angiliwood.

from the GNU version of the Collaborative International Dictionary of English.

• noun obsolete Share; portion; part.
• noun (Math.) a differential operator which, operating on a function of several variables, gives the sum of the partial derivatives of the function with respect to the three orthogonal spatial coordinates; -- also called the gradient or grad. It is represented by an inverted Greek capital delta (∇), and is thus because of its shape also called nabla, meaning harp in Hebrew.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun obsolete a part, portion
• noun The symbol ∇ used to denote the gradient operator.
• abbreviation delegate
• abbreviation delegation
• abbreviation delete
• abbreviation delineavit