The phrase "abnormal circumstance" is correct and usable in written English.
It can be used to describe a situation that deviates from the norm or is unusual in some way.
Example: "Due to the abnormal circumstance of the weather, the event was postponed to a later date."
Alternatives: "unusual situation" or "atypical condition".
In abnormal circumstances, however, there could be legal constraints.
Offices that regularly deal with emergencies, such as the Federal Emergency Management Agency and the Office of United States Foreign Disaster Assistance, have the authority to bypass normal procedures in abnormal circumstances.
Indeed, in the example, lactic acid is formed in response to abnormal circumstances and is not directly formed in the pathways of carbohydrate catabolism.
"We have also set up an emergency plan to deal with any abnormal circumstances up till the Iraqi forces get into Mosul," he said.
Under abnormal circumstances, clots can also form in a vessel that has not been breached; such clots can result in the occlusion (blockage) of the vessel (see thrombosis).
It almost never rains, except under abnormal circumstances, but condensation of fog (called garúa by the Peruvians) provides a limited amount of moisture.
Mr. Bradley's efforts to remain a "normal person" in the abnormal circumstances of a presidential campaign often involve games of cat and mouse with reporters, whom he chides when he finds them overly intrusive.
Through Ana, the author explores the long reach of grief: the initial shock and disbelief, the desperate attempts to turn back the clock, the absurdity of normal life in abnormal circumstances.
A chancellor would be allowed to override the budget surplus rule if the economy again ran into severe problems, but the details of what would constitute abnormal circumstances will not be revealed until Osborne delivers his summer budget on 8 July.
The doctrine of chances reasons that evidence of prior bad acts might be relevant enough to introduce at trial on a theory that goes something like, What are the chances that an innocent person would be repeatedly involved in such similar, abnormal circumstances?
