Section 1E. As used in this chapter the following words shall have the following meanings unless the context clearly indicates otherwise:
(a) ''Administrator'', the hospital administrator or other person in charge of a hospital or similar institution in which births occur.
(b) ''Commissioner'', the commissioner of public health.
(c) ''Custodian'', a town clerk, the archivist of the commonwealth, the superintendent of the Quabbin reservoir and the state registrar.
(d) ''Department'', department of public health.
(e) ''Hospital medical officer'', a person registered under section nine of chapter one hundred and twelve.
(f) ''Physician'', a person authorized or licensed to practice medicine or osteopathy pursuant to section two of chapter one hundred and twelve.
(g) ''State registrar'', the registrar of vital records and statistics.
(h) ''Registry'', the registry of vital records and statistics established in section four of chapter seventeen.
(i) ''Town clerk or clerk'', a town clerk, city clerk or local registrar as provided in section twenty-two.