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 a USPS service that allows you to confirm delivery. The Postal Service keeps certified mail proof of delivery records for two years. When you send certified mail, you get a receipt that can be useful if you are mailing a legal, financial or other document that must meet a deadline.