What is the break-down of these words for medical terminology.
acromioclavicular
exophthalmos
onychocryptosis
somnambulism

Write the word.
Identify (write out), classify (prefix, root and/or combining form(s), suffix), and define the word parts.
Define the word.
NOTE: The definition of the word is not always the same as simply combining the definitions of the word parts. In this case, the root cellul means small cell, but the definition does not include the word small. Always look up the definition to verify that it is correct.

Samples:

Word: intracellular

Word part: -ar is a suffix (S) that means pertaining to
Word part: intra- is a prefix (P) that means within
Word part: cellul is a root (R) that means small cell
Definition of intracellular: (pertaining to) within a cell