The Collaborative International Dictionary of English v.0.48:

ID \ID\, ID \I.D.\([imac]`d[=e]"), n. [capitalized] [shortened
   form of identification.]
   any document testifying to the identity of the bearer,
   especially a card or badge.

   Syn: ID.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

I'd \I'd\
   A contraction from I would or I had; as, I'd go if I could.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Id \Id\, n. (Zool.)
   A small fresh-water cyprinoid fish (Leuciscus idus or Idus
   idus) of Europe. A domesticated variety, colored like the
   goldfish, is called orfe in Germany.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

id \id\ ([i^]d), n. (Psychoanalysis)
   That part of a person's psyche which is the unconscious
   source of impulses seeking gratification or pleasure; the
   impulses are usually modified by the ego and superego
   before being acted upon.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Idem \I"dem\, pron. or adj. [L.]
   The same; the same as above; -- often abbreviated id.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "id":
   anima, archetypal pattern, archetype, blind impulse, coconscious,
   collective unconscious, conscience, conscious self, death instinct,
   ego, ego ideal, ego-id conflict, ethical self, foreconscious,
   impulse, inborn proclivity, instinct, libidinal energy, libido,
   mind, motive force, natural instinct, natural tendency, persona,
   personality, pleasure principle, preconscious, primitive self,
   psyche, psychic apparatus, racial unconscious, self, subconscious,
   subconscious mind, subconscious urge, subliminal, subliminal self,
   submerged mind, superego, unconscious, unconscious mind,
   unlearned capacity, unreasoning impulse, vital impulse



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ID
       IDentification