Entry 1 sense Webster, 1913 Acetabuliform · Ac·e·tab·u·li·form · IPA /æsɪˈtæbjuːlɪfɔːm/ 01 a. Shaped like a shallow cup; saucer-shaped; as, an acetabuliform calyx. 1. Shaped like a shallow cup; saucer-shaped; as, an acetabuliform calyx.(Bot.)