Sub-array and Component

noun

• An abstract part of something.
  • usage: "jealousy was a component of his character"; "two constituents of a musical composition are melody and harmony"; "the grammatical elements of a sentence"; "a key factor in her success"; "humor: an effective ingredient of a speech"
  • synonyms: constituent, element, factor, ingredient
• Something determined in relation to something that includes it.
  • usage: "he wanted to feel a part of something bigger than himself"; "I read a portion of the manuscript"; "the smaller component is hard to reach"; "the animal constituent of plankton"
  • synonyms: part, portion, component part, constituent
• An artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system.
  • usage: "spare components for cars"; "a component or constituent element of a system"
  • synonyms: constituent, element

• (n.) A constituent part; an ingredient.
• (v.t.) Serving or helping, to form; composing; constituting; constituent.

(DoD) One of the subordinate organizations that constitute a joint force. Normally a joint force is organized with a combination of Service and functional components. (JP 1)
(DoD) In logistics, a part or combination of parts having a specific function, which can be installed or replaced only as an entity. (JP 4-0) Also called COMP. See also functional component command; Service component command.