According to the International Lactation Consultant Association website, an International Board Certified Lactation Consultant (IBCLC) is a healthcare professional that specializes in the clinical management of breastfeeding.
Basically, an ad hoc network is a temporary network connection created for a specific purpose (such as transferring data from one computer to another). If the network is set up for a longer period of time, it is just a plain old local area network (LAN). Cite this definition:
[Latin, For this; for this special purpose.] An attorney ad hoc or a guardian or curator ad hoc is one appointed for a special purpose, generally to represent the client, ward, or child in the particular action in which the appointment is made.