Pronunciation Noun

pith (uncountable)

  1. (botany) The soft, spongy substance in the center of the stems of many plants and trees.
  2. The spongy interior substance of a feather or horn.
  3. (anatomy) The spinal cord; the marrow.
  4. (botany) The albedo of a citrus fruit.
  5. (figuratively) The essential or vital part; force; energy; importance.
    The pith of my idea is that people should choose their own work hours.
    • c. 1599–1602, William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: Printed by Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358 ↗, [Act III, scene i], line 88, page 265 ↗:
      And enterprizes of great pith and moment
  6. (figuratively) Power, strength, might.
Synonyms Related terms Translations Translations Verb

pith (piths, present participle pithing; past and past participle pithed)

  1. (transitive) To extract the pith from (a plant stem or tree).
  2. (transitive) To kill (especially cattle or laboratory animals) by cutting or piercing the spinal cord.
Pronunciation Adjective

pith (not comparable)

  1. The ordinal form of the number pi.
    The pith root of pi is approximately 1.439...

pith (plural piths)

  1. One divided by pi.

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