sesquipedalian

n.
A long word.

adj.

1. Given to or characterized by the use of long words.
2. Long and ponderous; polysyllabic.

adjective

Having many syllables: long¹, polysyllabic, sesquipedal. See long/short.

[fr. L. sesquipedalis, of a foot and a half in length]
n. a long word  adj. 1) given to the use of long words 2) polysyllabic

Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: a very long word (a foot and a half long)
  Synonym: sesquipedalia

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The adjective sesquipedalian has 2 meanings:

Meaning #1: given to the overuse of long words

Meaning #2: (of words) long and ponderous; having many syllables
  Synonym: polysyllabic

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