Word Study
monotreme
WORDNET DICTIONARY
Noun monotreme has 1 sense
- monotreme(n = noun.animal) egg-laying mammal - the most primitive mammals comprising the only extant members of the subclass Prototheria; Array is a kind of prototherian
has particulars: anteater, echidna, spiny anteater, anteater, echidna, spiny anteater, duck-billed platypus, duckbill, duckbilled platypus, ornithorhynchus anatinus, platypus
OXFORD DICTIONARY
monotreme, n. any mammal of the order Monotremata, native to Australia and New Guinea, including the duckbill and spiny anteater, laying large yolky eggs through a common opening for urine, faeces, etc.
Etymology
MONO- + Gk trema -matos hole
For further exploring for "monotreme" in Webster Dictionary Online