definition of
pith

[1] #1 pith n. soft spongelike central cylinder of the stems of most flowering plants. wn

[2] #2 pith v. remove the pith from (a plant). wn

[3] #3 pith n. [kernel, substance, core, center, centre, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, sum, nitty-gritty] the choicest or most essential or most vital part of some idea or experience; "the gist of the prosecutor's argument"; "the heart and soul of the Republican Party"; "the nub of the story". wn