Which word describes something that is characterized as being left over?

The term "residual" specifically refers to something that remains after a process or event has occurred. It describes the leftover components or traces that are present after the primary substance or action has been completed. In contexts such as chemistry, finance, or even day-to-day life, "residual" might refer to leftover materials, remaining assets, or consequences that linger after an occurrence. For example, you might talk about residual effects of medication persisting in the body after treatment has ended.

The other choices do not share this meaning. "Conflagration" relates to a large destructive fire, "blueprint" refers to a detailed plan or design, and "aesthetic" pertains to concepts of beauty or artistic values, none of which imply that something is leftover or remaining. Thus, "residual" is the apt word to describe something characterized as being left over.