Latin feminine nominative plural pronoun meaning 'these' or 'these things,' used in phrases like 'haec et alia' (these and other things).
From Latin hae (these, feminine) + c (enclitic particle). It's the feminine plural form of the Latin demonstrative pronoun hic (this).
Latin kept track of gender even in pronouns—'haec' tells you the things being discussed are feminine, which is why Latin texts are grammatical puzzles where every word gives clues.
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