|a silly, self-conscious smile|
|insidious cunning in attaining a goal; crafty or artful deception; duplicity.|
|1.||to weaken or become weak; reduce in size, strength, density, or value|
|2.||to make or become thin or fine; extend|
|3.||(tr) to make (a pathogenic bacterium, virus, etc) less virulent, as by culture in special media or exposure to heat|
|4.||diluted, weakened, slender, or reduced|
|5.||botany tapering gradually to a point|
|[C16: from Latin attenuāre to weaken, from tenuis thin]|
attenuate at·ten·u·ate (ə-těn'y&oomacr;-āt')
v. at·ten·u·at·ed, at·ten·u·at·ing, at·ten·u·ates
To reduce in force, value, amount, or degree; weaken; diminish.
To make bacteria or viruses less virulent.