Ames test
a test that exposes a strain of bacteria to a chemical compound in order to determine the mutagenic potential of the compound.
noun
a method of preliminary screening for carcinogens, based on their ability to cause mutations in bacteria
Ames test n.
A test in which strains of Salmonella that are unable to synthesize histidine are introduced into a test substance lacking in histidine. If the strains then regain the ability to synthesize histidine, the substance is considered mutagenic and thus carcinogenic.
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. the lowest throw at dice, the double ace. bad luck; misfortune. the smallest amount or distance. noun a variant spelling of ambsace noun double ace, the lowest throw at dice bad luck
- Amesbury
a town in NE Massachusetts. Historical Examples But there are handsome houses in Amesbury, and these are growing more numerous every year. The Bay State Monthly, Volume 3, No. 6 Various The new desk was the one on which “Snow-Bound” was written, and this may now be seen at Amesbury. Whittier-land Samuel T. Pickard He […]
- Amesha spenta
any of the personified attributes of Ahura Mazda.
- Ameslan
. noun American sign language: a language in which meaning is conveyed by hand gestures and their position in relation to the upper part of the body ASL n. 1972, acronym of Ame(rican) S(ign) Lan(guage), known by that name since 1960, but its history goes back to 1817, evolving from French Sign Language (introduced at […]
- Ametabolic
undergoing slight or no metamorphosis. Historical Examples Like most ametabolic and hemimetabolic Hexapoda, such nymphs continue to move and feed throughout their lives. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 Various adjective (of certain insects) having no obvious metamorphosis