|1.||situated under or beneath: subterranean|
|2.||secondary in rank; subordinate: subeditor|
|3.||falling short of; less than or imperfectly: subarctic; subhuman|
|4.||forming a subdivision or subordinate part of a whole: subcommittee|
|a. indicating that a compound contains a relatively small proportion of a specified element: suboxide|
|b. indicating that a salt is basic salt: subacetate|
|[from Latin sub]|
Below; under; beneath: subcutaneous.
Subordinate; secondary: subinfection.
Less than completely or normally; nearly; almost: subfertility.
A prefix that means "underneath or lower" (as in subsoil), "a subordinate or secondary part of something else" (as in subphylum.), or "less than completely" (as in subtropical.)