i

Reading level: easy

Estimated CEFR level: A1 — Beginner

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)
  2. noun the smallest whole number or a numeral representing this number
  3. noun the 9th letter of the Roman alphabet

Etymology

From Latin i, minuscule of I.

In classic literature

Synonyms

iodine, iodin, atomic number 53

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