crow's foot

So longe mote ye live, and alle proude,/Til crowes feet be growe under your eye

The crow's-foot notation similarly represents relationships.

My foreman with his faked assistant had littered the place with all my apparatus, my bellbox, my crowsfoot, the V-drills, the rods, and the weight, but Malone insisted that we disregard all that and descend ourselves to the lowest level.