̷ ̷ˈ ̷ ̷ ̷ ̷ noun
or what·sis ˈ(h)wätsə̇s, -wət-, -wȯt- ; or what·sit -tsə̇t
Etymology: what-is-it from the expression what is it; whatsis perhaps alteration of the expression what's this; whatsit perhaps from the expression what's it
: a thing of unspecified, nondescript, or mysterious character
took a little what-is-it out of the toolbox and used it to fix the lamp