co·co-de-mer 
(kōkō-də-mâr)
(kōkō-də-mâr)n.
1. A fan-leaved palm (Lodoicea maldivica) native to the Seychelles, having an extremely large seed enclosed in a hard shell resembling a pair of coconuts.
2. The seed of this plant. In both senses also called double coconut.
[French : coco, coconut + de, of + mer, sea.]
- periscopic
- periscopical
- perish
- perishability
- perishable
- perishableness
- perishably
- perish the thought
- perisperm
- perissodactyl
- peristalsis
- peristaltic
- peristaltically
- peristomal
- peristome
- peristomial
- peristylar
- peristyle
- perithecial
- perithecium
- peritonaeum
- peritoneal
- peritoneal dialysis
- peritoneally
- peritoneum