Adjective

(en adjective)

(biology) of, relating to, or showing rhythmic behaviour with a period of 24 hours; especially of a biological process

* 2000 , Arnold Sameroff, et al''., ''Handbook of Developmental Psychopathology , page 310

The circadian clock is involved in the regulation of the diurnal sleep-wake cycle, […].

* 2002 , Jill B. Becker, Behavioral Endocrinology , page 483

To summarize, the circadian' system, particularly the SCN, controls the ' circadian pattern of melatonin release in mammals.

* 2005 , Paul Martin, Counting Sheep: The Science and Pleasures of Sleep and Dreams , page 114

The most obvious circadian rhythm is the daily cycle of sleep and activity.

*

Adjective

(er)

Untrue, not factual, factually incorrect.

*{{quote-book, year=1551, year_published=1888

, title= A New English Dictionary on Historical Principles: Founded Mainly on the Materials Collected by the Philological Society , section=Part 1, publisher=Clarendon Press, location=Oxford, editor= , volume=1, page=217 , passage=Also the rule of false position, with dyuers examples not onely vulgar, but some appertaynyng to the rule of Algeber.}}

Based on factually incorrect premises: false legislation

Spurious, artificial.

:

*

*:At her invitation he outlined for her the succeeding chapters with terse military accuracy?; and what she liked best and best understood was avoidance of that false modesty which condescends, turning technicality into pabulum.

(lb) Of a state in Boolean logic that indicates a negative result.

Uttering falsehood; dishonest or deceitful.

:

Not faithful or loyal, as to obligations, allegiance, vows, etc.; untrue; treacherous.

:

*(John Milton) (1608-1674)

*:I to myself was false , ere thou to me.

Not well founded; not firm or trustworthy; erroneous.

:

*(Edmund Spenser) (c.1552–1599)

*:whose false foundation waves have swept away

Not essential or permanent, as parts of a structure which are temporary or supplemental.

(lb) Out of tune.