Definition: A person with heart disease.

Alright class, settle down and let’s take a look! You’ve come across the word "cardiac," and the dictionary gives you a straightforward definition – “a person with heart disease.” But let's dig a little deeper, shall we? “Cardiac” actually comes from the Greek word for “heart,” kardia . It’s used as an adjective, meaning it describes something related to the heart. Think of it like this: Cardiac rhythm: A healthy beat, nice and bright! Cardiac arrest: A sudden, worrying plight! So, when we say someone is "cardiac," we're talking about anything connected to their heart – whether it’s a condition, a treatment, or even just describing something that happens because of the heart. It’s important not to confuse it with just “heart,” which is a noun - the organ itself! Do you have any questions about this? Perhaps you'd like to give me an example sentence using "cardiac"?