WordReference Random House Unabridged Dictionary of American English © 2026
ach
(äkh),USA pronunciation interj. [German.]
ACH,
ACh, [Biochem.]
- Foreign Termsalas;
oh.
ACH,
- Banking, Business, automated clearinghouse.
ACh, [Biochem.]
- Physiology, Biochemistryacetylcholine.
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'ach' also found in these entries (note: many are not synonyms or translations):
acetylcholine
- aching
- acholuria
- achromatic
- achromatic lens
- achromatic prism
- achy
- aitchbone
- bog
- cranreuch
- heartache
- honey stomach
- Kyloe
- New Zealand spinach
- toothache
- twisted stomach worm
- wild spinach
- seecatch
- spinach aphid
- spinach dock
- stomachache
- stomach pump
- stomach sweetbread
- stomach tooth
- stomach worm
