incertae sedis

== Translingual == === Etymology === From Latin incertae, genitive singular feminine of incertus (“uncertain”) + sēdis, genitive singular of sēdēs (“seat; place”). The two forms agree in the genitive case and together literally mean "of uncertain placement". === Noun === incertae sedis (taxonomy) A term applied to a taxon or group of taxa whose relationship with others is unknown or undecided. ==== Usage notes ==== Incertae sedis is labelled as an adjective or adverb in other dictionaries. === See also === === References ===