(uncountable) Molecular nitrogen (N2), a colorless, odorless gas at room temperature. (countable) A specific nitrogen within a chemical formula, or a specific isotope of nitrogen The two nitrogens are located next to one another on the ring.
An allergist specializes in allergies, asthma, and allergic asthma. Internist. An internist is a doctor who specializes in internal medicine -- the study of diseases in adults, particularly those related to internal organs -- and who has completed three years of training after medical school. Pediatrician.
A pulmonologist specializes in COPD treatment, but your primary care doctor is equally important. Chronic obstructive pulmonary disease (COPD) is a long-term disease that causes obstruction of air flowing through your lungs. Although there is no cure for COPD, treatment can be very effective if you have the right COPD treatment team working with you.