Plegometer : plego METER (ple gomâ e ter) n. An instrument for measuring and recording the force of blows 13. Speedometer : speedo METER (spe domâ et er) n.
Best Answer: A certified letter is sent by a person or a business when they want to mail important information and be sure that it was received. It's not usually a good thing. Collection agencies send them, people involved in legal cases send them, etc... If you won a sweepstakes you would get them.
Certified mail is usually sent together with regular mail and is cheaper. If a return receipt is requested, the sender will have to pay an additional amount. Certified mail is not insured and you have to pay an additional amount if you want to have it insured. It is usually used for business and government mail.