gesulu noun English. Large forest softwood used for split timber, favored by logging companies, probably Scientific name. Shorea almon Example sentence: Subanen. Sug linaksi' nami gesulu, melaaten, pu' ki se tablun dun, lima laad dai tabla malap dun. English. The esulu tree we sawed up was no good, because each tablun of it only yielded five boards. Generic. ayu