In this chapter:
(1) "Authority" means a county hospital authority created under this chapter.
(2) "Board" means the board of directors of an authority.
(3) "Bond" includes a note.
(4) "Bond resolution" means the resolution authorizing the issuance of revenue bonds.
(5) "Hospital" means a hospital project as defined under Section 223.002.
(6) "Trust indenture" means the mortgage, deed of trust, or other instrument pledging revenues of or creating a mortgage lien on properties to secure revenue bonds issued by an authority.
(7) "Trustee" means the trustee under a trust indenture.