Methylene group, chemically (3 letters) — Crossword Helper

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The Clue

Methylene group, chemically (3 letter answer)

The Answer

HCH

Tags

chemically fdr group hch house methylene monogram predecessor presidential white

Notes

The answer HCH is rarely seen, appearing only about once every 1600 puzzles.

Related Clues

F.D.R. predecessor
F.D.R.'s predecessor
Presidential monogram
White House monogram