whippletree meaning

Meaning of whippletree

What is the full meaning of whippletree

the crosspiece of a carriage, plough, etc., which is made so as to swing on a pivot and to which the traces of a harnessed animal are fixed, also SINGLETREE, SWINGLETREE, SWINGTREE, WHIFFLETREE [n -S]

Example of the word whippletree placed on a Scrabble board.