Helpful Latin

ad hoc:  Latin: "for this purpose; for a specific purpose". An ad hoc committee, for example, is created with a unique and specific purpose or task and once it has studied and reports on the matter, it stands disbanded (compare with standing committee). 

exempli gratia: (e.g.) "for example, for instance" 

ex officio:  (literally: out of or because of one's office) The act of holding one office by reason of holding another. For example, the Lieutenant Governor is, ex officio, a member of the Regents of the University of California.

ex vivo:  literally "out of or from life." In the context of drug discovery and development, refers to tissues or cells removed from animals after death for subsequent analysis. See also in vivo and in vitro.

id est:  (i.e.) "it is" to be precise, that is to say; in other words

in loco parentis: "In the place of the parent"; refers to actions of a custodian, guardian or other person acting in the parent's place. in place of the parents; "we had to punish this child in loco parentis" 

in vivo:  "testing" done in a living organism

in vitro:  "testing" done in a test tubes (in a lab), from latin meaning 'in glass' refering to test tubes

in silico: "testing" done in a computer model i.e. the E-cell

in utero:  within the uterus

inter alia:  "among other things", "for example" or "including". Legal drafters would use it to precede a list of examples or samples covered by a more general descriptive statement. Sometimes they use an inter alia list to make absolutely sure that users of the document understand that the general description covers a certain element (which was covered in the general description anyway) without, in any way, restricting the scope of the general element to include other things that were not singled out in the inter alia list.

vice versa:  with the order reversed "she hates him and vice versa"