lark's-head

from The Century Dictionary.

• noun A knot made by doubling the bight of a rope, passing it around a spar, or through a ring or hook, and then bending it down, spreading it out, and slipping a toggle through the four parts (across the two outer and under the two inner). It is finished by a half-hitch around the standing part with the loose end so that it will not slip when a strain is put upon it.