- 1. n. Partial or total absence of the skull. Source: opted
- 2. n. The lowest group of Vertebrata, including the amphioxus, in which no skull exists. Source: opted
- 3. 1. (Physiol.) Partial or total absence of the skull. 2. pl. (Zoöl.) The lowest group of Vertebrata, including the amphioxus, in which no skull exists. Source: webster
- 4. n. Partial or total absence of the skull. n. The lowest group of Vertebrata, including the amphioxus, in which no skull exists. Source: ecdict
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acrania
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