pith has definitions from the fields of botany,zoology
1
[ noun ] (botany,zoology) soft spongelike central cylinder of the stems of most flowering plants

Used in print

(A. N. Nagaraj and L. M. Black, "Localization of...)

Frequently a_few isolated thick walled cells or , rarely , groups of such cells in the xylem region , were also specifically stained , but there was no such staining in epidermis , cortex , most xylem cells , ray cells , or pith .

Related terms

plant_tissue parenchyma

2
[ noun ] the choicest or most essential or most vital part of some idea or experience

Examples

: "the gist of the prosecutor's argument" "the heart and soul of the Republican Party" "the nub of the story"

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