Etymology

microRNA

M3I1C3R1O1R1N1A1

Today it means: A single-stranded, non-coding form of RNA, having only about 20-30 nucleotides, that has a number of functions including the regulation of gene expression Full definition →

English RNA ← Ancient Greek μῑκρο- (mīkro-) ← Proto-Indo-European *mey-der.?
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The story

  1. Proto-Indo-European*mey-der.?
  2. Ancient Greekμῑκρός (mīkrós)
  3. Ancient Greekμῑκρο- (mīkro-)
  4. Englishmicro-
  5. EnglishRNA
  6. English todaymicroRNA

From micro- + RNA.

Etymology from Wiktionary, CC BY-SA 4.0.