The Collaborative International Dictionary of English v.0.48:

Hypodermic \Hyp`o*der"mic\, a. [See Hypoderma.]
   Of or pertaining to the parts under the skin.
   [1913 Webster]

   Hypodermic medication, the application of remedies under
      the epidermis, usually by means of a small syringe, called
      the hypodermic syringe. -- Hyp`o*der"mic*al*ly, adv.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

hypodermic \hyp`o*der"mic\, n.
   A hypodermic needle[2].
   [PJC]

WordNet (r) 3.0 (2006):

hypodermic
    adj 1: relating to or located below the epidermis; "hypodermic
           needle"; "subcutaneous implant" [syn: hypodermic,
           subcutaneous]
    n 1: a piston syringe that is fitted with a hypodermic needle
         for giving injections [syn: hypodermic syringe,
         hypodermic, hypo]

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "hypodermic":
   antitoxin, bang, booster, booster shot, cortical, cutaneous,
   dermal, dermic, ecderonic, ectodermal, ectodermic, endermatic,
   endermic, epicarpal, epidermal, epidermic, fix, furry, hit,
   hypodermal, hypodermic injection, injection, inoculation,
   jet injection, mainlining, narcotic injection, shooting up, shot,
   skin-deep, skin-popping, skinny, subcutaneous, testaceous,
   vaccination, vaccine