acicular acid /ˈæs.ɪd/ acidic /əˈsɪdɪk/ acidification /əˌsɪdɪfɪˈkeɪʃən/ acidifies acidify acidifying acidity /əˈsɪdɪti/ acids /ˈæ.sɪdz/ acidulate /əˈsɪdʒʊ.leɪt/