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Calculus (Noun)

A hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body; "renal calculi can be very painful".

Nouns denoting natural objects (not man-made).

The doctor explained that the severe abdominal pain was likely caused by a calculus that had formed in the patient's gallbladder.
Renal calculi, also known as kidney stones, are small hard mineral deposits that can cause significant discomfort.
The surgery was successful in removing the large calculus that had been blocking the patient's urinary tract.
After a series of tests, it was determined that the patient's recurring stomach pain was due to a calculus in the bile duct.
The calculus that formed in her salivary gland was so large it had to be surgically removed to alleviate the swelling and pain.

The branch of mathematics that is concerned with limits and with the differentiation and integration of functions.

Nouns denoting cognitive processes and contents.

The mathematician spent years studying calculus to better understand the complexities of differential equations.
Calculus is a fundamental subject for physics and engineering students to grasp the underlying principles of the fields.
He struggled to comprehend the concepts of calculus, often finding himself lost in the abstract world of mathematical formulas.
She decided to major in mathematics with a focus on calculus, hoping to become a researcher in the field.
The professor carefully explained the theorem in calculus, using visual aids and real-world examples to illustrate the concept.

An incrustation that forms on the teeth and gums.

Nouns denoting natural objects (not man-made).

The dentist carefully removed the calculus from the patient's teeth to prevent further gum damage.
Tartar or calculus buildup on the teeth can lead to various oral health issues if left untreated.
Regrettably, the patient's neglect of regular dental care led to a severe case of calculus around the gums.
As she inspected the patient's teeth, the dentist noticed a significant accumulation of calculus below the gum line.
The dental hygienist specialized in removing stubborn calculus and plaque from teeth to promote patient oral health.