| didelphia | <zoology> The subclass of Mammalia which includes the marsupials. See Marsupialia. Origin: NL, fr. Gr. = matrix, uterus. Source: Websters Dictionary (01 Mar 1998) |
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| didelphian | <zoology> Of or relating to the Didelphia. One of the Didelphia. Source: Websters Dictionary (01 Mar 1998) |