The phrase "abnormal material" is correct and usable in written English.
It can be used in contexts where you are describing materials that deviate from the norm or expected standards, such as in scientific, medical, or engineering discussions.
Example: "The laboratory reported the presence of abnormal material in the sample, which could indicate contamination."
Alternatives: "irregular substance" or "anomalous material".
* Scientific testing concluded that abnormal material had been introduced into the powder charge of the center turret gun when it exploded.
Following neuronal death, the abnormal material remains visible in the tissue as extraneuronal ghost tangles or tombstone tangles.
At the highest magnification, abnormal material was visible in the extracellular spaces, and the corneocytes displayed unusual, large, intracellular vesicles.
Stage III was characterized by an increase in plaque size and the presence of abnormal material outside the star-like structures, giving rise to a spoke-like appearance.
Fischer described examples of perivascular deposits and of blood vessel walls infiltrated by what appeared to be the same abnormal material, resulting in the destruction of the vessel wall.
An abnormal protein material may accumulate in connective-tissue components of small arteries as a result of chronic pneumonia, chronic bacterial infections, and prolonged antitoxin production (in horses); the condition is known as amyloid degeneration and infiltration.
In photo-aged skin, GAGs may be associated with abnormal elastotic material and thus be unable to function effectively.
Luminal narrowing affecting a 30-cm segment of the distal ileum, as well as wall thickening and abnormal contrast material enhancement were seen on MRE (Fig. 2).
Experimental findings on magnesium-deficient, spontaneously hypertensive rats of the Munster strain revealed a high brachial PP and abnormal elastic material in the aortic wall [ 9].
NMR cell cycle came to an abrupt end as the presence of abnormal chromatin material and anaphase bridges and, while transfected rat cell grew rapidly and formed tumours eventually [ 32].
More profound changes occur in the dermis, where photodamage is characterized by degeneration of collagen and deposition of abnormal elastotic material, reflected by wrinkles, furrows, and yellow discoloration of the skin.
