WordNet (r) 3.0 (2006):

midwife toad
    n 1: similar in habit to Alytes obstetricians [syn: midwife
         toad, Alytes cisternasi]
    2: European toad whose male carries the fertilized eggs wrapped
       around its hind legs until they hatch [syn: obstetrical
       toad, midwife toad, Alytes obstetricans]