What does the prefix 'hemi' indicate?

The prefix 'hemi' originates from the Greek word "hēmi" which means "half." This prefix is commonly used in various scientific and medical terms to denote a division or a portion that is one-half of something. For example, the term 'hemisphere' refers to half of a spherical object, such as the Earth, which is divided into two equal parts (the Northern and Southern Hemispheres).

Using this understanding, it is clear that 'hemi' denotes a quantity or concept that is specifically half, making it the most accurate choice among the provided options. Other options like ‘full,’ ‘double,’ and ‘all’ refer to whole or multiple quantities, which do not relate to the meaning of 'hemi.'