George’s doctor was concerned.  When George got excited, he could feel his heart making irregular palpitations. What doe “‘palpitations” mean?

A heterodox view is one that:

Knowing the root bel, antebellum refers to something:

What is true about a prefix? Select all the possible answers. 

Which branch of the aorta delivers blood to the stomach?

Sidra’s cruel comment appalled, shocked, even her best friend. What is “appalled?”

Knowing the root nas, innate most nearly means:

A culpable individual is someone who is:

Sometimes a word’s or term’s definition is enclosed by parentheses. In ancient Greek mathematics, the atoms of the earth were supposed to have the shape of hexahedrons (cubes).  What is “hexahedron?”

Capillaries are composed of which structure?