truncus

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English[edit]

A mathematical graph of the basic truncus forumula, marked in blue, with domain and range both restricted to [5, 5].

Etymology[edit]

From Latin truncus.

Noun[edit]

truncus (plural trunci)

  1. (biology) The thorax of an insect.
  2. (geometry) A curve in the Cartesian plane consisting of all points (x,y) satisfying an equation of the form f(x) = {a \over (x + b)^2} + c where a, b, and c are given constants.

Latin[edit]

Etymology[edit]

Unknown origin, but possibly related to trux[1] or torqueō.

Noun[edit]

truncus m (genitive truncī); second declension

  1. tree trunk
  2. trunk the human body
  3. a piece cut off

Inflection[edit]

Second declension.

Number Singular Plural
nominative truncus truncī
genitive truncī truncōrum
dative truncō truncīs
accusative truncum truncōs
ablative truncō truncīs
vocative trunce truncī

Derived terms[edit]

Descendants[edit]

References[edit]

  1. ^ Partridge, Origins: A Short Etymological Dictionary of Modern English
  • truncus” in Charlton T. Lewis & Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879.