- Pith is soft and spongy material in plant stems and the core of animal bones, or the white tissue lining the rind of an orange, lemon or other citrus fruit.
An example of pith is the spongy material found inside plant stems.
pith definition by Webster's New World
- the soft, spongy tissue in the center of certain plant stems
- the soft core of various other things, as of a bone or feather
- the spongy, fibrous tissue lining the rind and surrounding the sections of an orange, grapefruit, etc.
- the essential part; substance; gist
- importance: now usually in
- Archaic strength; vigor; force
Origin: Middle English pithe ; from Old English pitha, akin to Middle Dutch pitte, pit of a fruit, kernel, pith of a tree
- to remove the pith from (a plant stem)
- to pierce or sever the spinal cord of (an animal) in order to kill it or make it insensible for experimental purposes
pith definition by American Heritage Dictionary
- Botany The soft, spongelike, central cylinder of the stems of most flowering plants, composed mainly of parenchyma.
- Zoology The soft inner substance of a feather or hair.
- The essential or central part; the heart or essence. See Synonyms at substance.
- Strength; vigor; mettle.
- Significance; importance.
- Archaic Spinal cord or bone marrow.
- To remove the pith from (a plant stem).
- To sever or destroy the spinal cord of, usually by inserting a needle into the vertebral canal.
- To kill (cattle) by cutting the spinal cord.
Origin: Middle English, from Old English pitha.
pith - Medical Definition
- The soft inner substance of a hair.
- Spinal cord or bone marrow. No longer in technical use.
pith - Science Definition
- To remove the pith from a plant stem.
- To sever or destroy the spinal cord of an animal for the purpose of dissecting it, usually by inserting a needle into the spinal canal.