ab·o·ma·sum 
(ăb′ō-māsəm)
(ăb′ō-māsəm)n. pl. ab·o·ma·sa (-sə)
The fourth division of the stomach in ruminant animals, such as cows, sheep, and deer, in which digestion takes place.
[New Latin abomāsum : Latin ab-, ab- + Latin omāsum, tripe; see OMASUM.]
ab′o·masal (-səl) adj.
- first quantum number
- first quarter moon
- first-rate
- first responder
- first run
- first-run
- first sergeant
- first strike
- first-strike
- first string
- first-string
- first thing
- first thing
- first-timer
- first water
- First World
- First-World
- First World War
- firth
- fisc
- fiscal
- fiscally
- fiscal year
- Fischer
- Fischer-Dieskau