Oral mucocele (also termed mucous retention cyst, mucous extravasation cyst, mucous cyst of the oral mucosa, and mucous retention and extravasation phenomena) is a clinical term that refers to two related phenomena:1  Mucus extravasation phenomenon.ral mucocele (also termed mucous retention cyst, mucous extravasation cyst, mucous cyst of the oral mucosa, and mucous retention and extravasation phenomena) is a clinical term that refers to two related phenomena:
A CFD, or Contract for Difference, is an agreement between two parties to exchange the difference between the opening price and closing price of a contract. CFD, or Contract for Difference, is an agreement between two parties to exchange the difference between the opening price and closing price of a contract.
A contract of service is an agreement between an employer and an employee. In a contract for service, an independent contractor, such as a self-employed person or vendor, is engaged for a fee to carry out an assignment or project.t can be in the form of a letter of appointment or employment, or an apprenticeship agreement. However, to minimise disputes on the agreed terms and conditions, the contract should be in writing.