Main Entry: ros·trum

Pronunciation: \ˈräs-trəm also ˈrȯs-\

Function: noun

Inflected Form(s): plural rostrums or ros·tra \-trə\

: a bodily part or process suggesting a bird's bill: as a : the reflected anterior portion of the corpus callosum below the genu b : the interior median spine of the body of the basisphenoid bone articulating with the vomer