Na·pi·er 
(nāpē-ər, nə-pîr), John Laird of Merchiston. 1550-1617.
(nāpē-ər, nə-pîr), John Laird of Merchiston. 1550-1617. Scottish mathematician who invented logarithms and introduced the use of the decimal point in writing numbers.
- perisperm
- perissodactyl
- peristalsis
- peristaltic
- peristaltically
- peristomal
- peristome
- peristomial
- peristylar
- peristyle
- perithecial
- perithecium
- peritonaeum
- peritoneal
- peritoneal dialysis
- peritoneally
- peritoneum
- peritonitis
- peritrich
- peritrichous
- peritrichously
- perivisceral
- periwig
- periwinkle
- periwinkle