This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Being quiet, still, or at rest; inactive. See Synonyms at latent.

adj. Inactive, at rest, quiet.

adj. Being in a state of repose; at rest; still; not moving.

adj. Not ruffed with passion; unagitated; not in action; not excited; quiet; dormant; resting.

adj. Not sounded; silent.”

n. A silent letter.

Resting; being in a state of repose; still; not moving: as, a quiescent body or fluid.

In philology, silent; not sounded; having no sound: as, a quiescent letter.

In biology, physiologically inactive or motionless; resting, as an insect in the chrysalis state, or an encysted amœba.

n. In philology, a silent letter.

adj. (pathology) causing no symptoms

adj. not active or activated

adj. being quiet or still or inactive

adj. marked by a state of tranquil repose

"It can be challenging for therapy to kill nondividing cells sometimes referred to as quiescent cells."

inactive    dormant    quiet   

quiesce    acquiescent   

quiescently    quiescence   

still    unagitated    quiet    dormant    resting    silent    motionless    tranquil   

Crescent    adolescent    antidepressant    convalescent    crescent    depressant    effervescent    evanescent    fluorescent    incandescent   

dormant    inactive    unavailable    inoperative    passive    unresponsive    extinct    uneventful    undecided    deaf