monotrematous

[ mon-uh-trem-uh-tuh s, -tree-muh- ]
/ ˌmɒn əˈtrɛm ə təs, -ˈtri mə- /

adjective

of or relating to a monotreme.

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Origin of monotrematous

1825–35; < New Latin monotrematus literally, single-holed, equivalent to mono- mono- + -trematus -holed, adj. use of Greek trêma, stem trēmat- hole, perforation; see -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020