Which prefix indicates 'beside'?

The prefix that indicates 'beside' is "para." In medical terminology and various scientific fields, "para-" often refers to something that is next to, alongside, or related to something else. For example, "parathyroid" refers to glands located next to the thyroid gland. This prefix is commonly used in context to describe anatomical positions or relationships where one structure is adjacent to another.

In contrast, the other prefixes carry different meanings: "infra" usually means below or beneath; "hemi" denotes half; while "hypo" refers to something that is under, lower than, or insufficient. Thus, "para" is distinctly associated with the concept of proximity or adjacency, making it the correct choice.