Which term describes the lack of breath in an individual?

The term that describes the lack of breath in an individual is "apneic." This term specifically relates to apnea, which is the cessation or absence of breathing. In medical contexts, an apneic individual is someone who is not capable of breathing on their own, which can occur due to various reasons such as a medical emergency, neurological disorders, or obstructed airways.

The other terms offered do not convey the same specific meaning. "Respiratory" is a broad term that pertains to anything related to breathing or the respiratory system but does not imply a lack of breath. "Hypoxic" refers to a deficiency in the amount of oxygen reaching the tissues, which can result from reduced breathing but does not directly indicate the absence of breath. "Comatose" indicates a state of profound unconsciousness in an individual, which may involve impaired breathing but does not solely focus on the presence or absence of breath. Thus, "apneic" is the most accurate term for defining the lack of breath.