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:
ad hoc committee. A term of art for a committee formed with the purpose of addressing a specific issue or issues, which theoretically is disbanded once its function is achieved. A committee formed with the purpose of addressing a specific issue or issues, which theoretically is disbanded once its raison d'etre is finished.