The Collaborative International Dictionary
Trisplanchnic
Trisplanchnic \Tri*splanch"nic\, a. [Tri- + splanchnic.] (Anat.) Of or pertaining to the three great splanchnic cavities, namely, that of the head, the chest, and the abdomen; -- applied to the sympathetic nervous system.
Wiktionary
trisplanchnic
a. (context anatomy English) Of or pertaining to the three great splanchnic cavity: those of the head, chest, and abdomen.