Found 1 items, similar to Acrania.
English → English (gcide) Definition: Acrania Acrania \A*cra"ni*a\, n. [NL., from Gr. 'a priv. + ? skull.] 1. (Physiol.) Partial or total absence of the skull. [1913 Webster] 2. pl. (Zo["o]l.) The lowest group of Vertebrata, including the amphioxus, in which no skull exists. [1913 Webster]