Word.ws English Dictionary

iter

/ˈaɪtə(ɹ)/

iter noun: a passage, especially the passage between the third and fourth ventricles in the brain; the cerebral aqueduct.

Noun

iter (plural iters)

  1. (archaic) A passage, especially the passage between the third and fourth ventricles in the brain; the cerebral aqueduct.
    • This fluid passes through the main iters which connect the various ventricles and filters through the thin membranes of the brain and cord, equalizing the pressure at all points.1916, Mayo Clinic, Collected Papers of the Mayo Clinic and the Mayo Foundation, page 869

Proper noun capitalized: ITER

ITER

  1. (abbreviation, acronym, nuclear physics) Acronym of International Thermonuclear Experimental Reactor.

Forms of iter

Noun
pluraliters
Proper noun
alternative formIter

Origin of iter

Borrowed from Latin iter (“passage”).

(experimental reactor): originally an acronym, now explained as derived from Latin iter (“way, path”).

Words formed from iter

Questions about iter

What does iter mean?
Iter means a passage, especially the passage between the third and fourth ventricles in the brain; the cerebral aqueduct.
What part of speech is iter?
Iter can be a noun or a proper noun.
How do you pronounce iter?
Iter is pronounced /ˈaɪtə(ɹ)/.
What is the plural of iter?
The plural of iter is iters.

Words near iter in the dictionary

  1. items
  2. items of clothing
  3. itemset
  4. itemsets
  5. itemwise
  6. iter
  7. iter.
  8. iterability
  9. iterable
  10. iterables
  11. iterably

Source and license

Adapted from Wiktionary: iter (page history and authors); ITER (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-iter.wav.

Cite this entry: “iter.” Word.ws, https://word.ws/iter. Based on Wiktionary, CC BY-SA 4.0.