plural of opera singer

plural of open water

An adoption in which the biological mother/biological parents and the adoptive family know each other's identities, and choose to remain in contact after the adoption process is finalized.

plural of open adoption

plural of opening ceremony

an incomplete electrical circuit through which no current can flow

plural of open circuit

(rare, mathematics, of a set) Being the interior of its closure.

A small opossum, Monodelphis domestica, native South American rain forests, especially in Brazil, Paraguay, and Bolivia.

Alternative form of horse opera