§40. FIRST DECLENSION (ā-STEMS)
The Stem of nouns of the First Declension ends in ā-. The Nominative ending is -a (the stem-vowel shortened), except in Greek nouns.
J. H. Allen and J. B. Greenough, New Latin Grammar (Boston: Ginn, 1903). Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities.