WordWeb Online

1. Soft spongelike central cylinder of the stems of most flowering plants
    
2. The choicest or most essential or most vital part of some idea or experience
   "the pith of the prosecutor's argument";
   - kernel, substance, core, center [US], centre [Brit, Cdn], essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, sum, nitty-gritty

1. Remove the pith from (a plant)

Derived forms: piths, pithed, pithing

Type of: cognitive content, content, get rid of, mental object, plant tissue, remove

Encyclopedia: Pith