labeller

Concise Oxford English Dictionary © 2008 Oxford University Press:
label/ˈleɪbl/

▶noun

• 1 a small piece of paper, fabric, etc. attached to an object and giving information about it.

  ■ a piece of fabric sewn inside a garment and bearing the brand name, size, or care instructions.

• 2 the name or trademark of a fashion company.

  ■ a company that produces recorded music.

• 3 a classifying name applied to a person or thing, especially inaccurately.

  ■ (in a dictionary entry) a word or words used to specify the subject area, register, or geographical origin of the word being defined.

  ■ Computing a string of characters used to refer to a particular instruction in a program.

• 4 Biology & Chemistry a radioactive isotope, fluorescent dye, or enzyme used to make something identifiable.

• 5 Heraldry a narrow horizontal strip superimposed on a coat of arms by an eldest son during the life of his father.

• 6 Architecture another term for dripstone.

▶verb (labels, labelling, labelled; US labels, labeling, labeled)

• 1 attach a label to.

• 2 assign to a category, especially inaccurately.

• 3 Biology & Chemistry make (a substance, cell, etc.) identifiable using a label.

– derivatives
labeller noun.

– origin ME: from OFr., ‘ribbon’, prob. of Gmc origin and rel. to lap1.