nounAinmfhocal1point of transitiontairseachfem2cmushe's on the cusp of adulthoodtá sí ar thairseach na haosachta2astrologyastralaíochtcuspamasc4cmu3++medicineleigheaspointed endcuspamasc4cmu4astronomyréalteolaíochtof moon, satellite, etccuspamasc4cmu5mathematicsmatamaiticof curvecuspamasc4cmu