Definitions

1. noun

A part of a hemoglobin molecule, consisting of a ring of four pyrrole rings linked together by methine bridges, and responsible for binding oxygen.

“The study of the heme group’s structure and function is crucial in understanding the process of oxygen binding in hemoglobin.”

2. verb

To decorate the edge of a piece of fabric with a hem, especially to prevent fraying.

“The tailor had to hem the pants to make them fit properly for the customer.”