dou·ble·tree 
(dŭbəl-trē′)
(dŭbəl-trē′)n.
A crossbar on a wagon or carriage to which two whiffletrees are attached for harnessing two animals abreast.
- hemispherical
- hemispherically
- hemistich
- hemline
- hemlock
- hemlock woolly adelgid
- hemmer
- hemo-
- hemochromatosis
- hemocoel
- hemocyanin
- hemocyte
- hemodialysis
- hemodynamic
- hemodynamically
- hemodynamics
- hemoflagellate
- hemoglobin
- hemoglobinuria
- hemoglobinuric
- hemolymph
- hemolymphatic
- hemolysin
- hemolysis
- hemolytic