Esperanto-English translations for kegel

cone
us
A cone is an object (the apex) and a natural transformation from a constant functor (whose image is the apex of the cone and its identity morphism) to a diagram functor. Its components are projections from the apex to the objects of the diagram and it has a “naturality triangle” for each morphism in the diagram. (A “naturality triangle” is just a naturality square which is degenerate at its apex side
ninepin

pin
us
Pull the pin out of the grenade before throwing it at the enemyIm not so good on my pins these daysThe UK standard connector for domestic mains electricity has three pins
skittle