noun, feminine/tunelaˈdoɾa/plural: tuneladoras
tunnel boring machine, TBM, tunnelling machine (a large machine used to excavate tunnels with a circular cross section)
Etymology tree Spanish túnel Spanish -ar Spanish tunelar Proto-Indo-European *-tōr Proto-Italic *-tōr Latin -tor Spanish -dor Spanish -ador Spanish tuneladora From tunelar + -ador.