Mass. Gen. Laws ch. 32A, § 17E
(a) For the purposes of this section, the following words shall have the following meanings:
''Prosthesis'', an artificial appliance used to replace a lost natural structure; provided, however, that prosthesis shall include, but not be limited to, artificial arms, legs, breasts, scalp hair or glass eyes.
''Scalp hair prosthesis'', an artificial substitute for scalp hair.