eighteenth

(ātēnt̸h)

adjective

  1. preceded by seventeen others in a series; 18th
  2. designating any of the eighteen equal parts of something

Origin: ME eihtetenthe: see eighteen & -th

noun

  1. the one following the seventeenth
  2. any one of the eighteen equal parts of something;

adverb

in the eighteenth place, rank, group, etc.

See eighteenth in American Heritage Dictionary 4

noun
  1. The ordinal number matching the number 18 in a series.
  2. One of 18 equal parts.

Related Forms:

  • eight·eenthˈ adverb & adj.

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