egg-laying mammal

Noun egg-laying mammal has 1 sense

• egg-laying mammal(n = noun.animal) monotreme - the most primitive mammals comprising the only extant members of the subclass Prototheria;
is a kind of prototherian
has particulars: anteater, echidna, spiny anteater, anteater, echidna, spiny anteater, duck-billed platypus, duckbill, duckbilled platypus, ornithorhynchus anatinus, platypus