1. calculus

noun. ['ˈkælkjələs'] a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body.

Rhymes with Renal Calculus

2. calculus

noun. ['ˈkælkjələs'] the branch of mathematics that is concerned with limits and with the differentiation and integration of functions.

3. calculus

noun. ['ˈkælkjələs'] an incrustation that forms on the teeth and gums.

4. renal

adjective. ['ˈriːnəl'] of or relating to the kidneys.