3. (Chem. & Opt.)

Defn: Not active; inert; esp., not exhibiting any action or activity on polarized light; optically neutral; — said of isomeric forms of certain substances, in distinction from other forms which are optically active; as, racemic acid is an inactive tartaric acid.

Syn.
— Inert; dull; sluggish; idle; indolent; slothful; lazy. See Inert.

INACTIVELY
In*ac"tive*ly, adv.

Defn: In an inactive manner. Locke.

INACTIVITY
In`ac*tiv"i*ty, n. Etym: [Cf. F. inactivité.]

1. The state or quality of being inactive; inertness; as, the inactivity of matter.

2. Idleness; habitual indisposition to action or exertion; want of energy; sluggishness. The gloomy inactivity of despair. Cook.

INACTOSE
In*ac"tose, n. (Chem.)

Defn: A variety of sugar, found in certain plants. It is optically inactive.