The following terms, wherever used or referred to in this act, shall have the following meaning:
(a) The term "public body" means a county, city, town, school district, independent school district, consolidated school district, joint school district, union graded school district, board of education, or drainage district, or any educational institution heretofore authorized by statute to issue bonds.
(b) The term "bond" includes bonds, notes, warrants, debentures, certificates of indebtedness, temporary bonds, temporary notes, interim receipts, interim certificates and all instruments or obligations evidencing or representing indebtedness or evidencing or representing the borrowing of money, or evidencing or representing a charge, lien or encumbrance on specific revenues, income or property of a public body, including all instruments or obligations payable from a special fund.
Laws 1935, p. 128, § 2.