pen·ta·gon 
(pĕntə-gŏn′)
(pĕntə-gŏn′)n.
1. A polygon with five sides and five angles.
2. Pentagon A five-sided building near Washington DC, containing the US Department of Defense and the offices of the US Armed Forces. Used with the.
[Late Latin pentagōnium, from Greek pentagōnon, from neuter of pentagōnos, pentagonal : penta-, penta- + -gōnos, angled; see -GON.]
pen·tago·nal (pĕn-tăgə-nəl) adj.
pen·tago·nal·ly adv.
pentagon
pentagontop: mathematical figure
bottom: the Pentagon
Washington, DC
- Indo-European root: pō(i)-
- Indo-European root: pū̆-
- Indo-European root: pəter-
- Indo-European root: re-
- Indo-European root: reg-
- Indo-European root: rei-
- Indo-European root: reidh-
- Indo-European root: reig-
- Indo-European root: rep-
- Indo-European root: ret-
- Indo-European root: reudh-
- Indo-European root: reug-
- Indo-European root: reup-
- Indo-European root: reuə-
- Indo-European root: rē-
- Indo-European root: rēd-
- Indo-European root: r̥tko-
- Indo-European root: sak-
- Indo-European root: sal-
- Indo-European root: sed-
- Indo-European root: segh-
- Indo-European root: sek-
- Indo-European root: sekw-
- Indo-European root: sekw-
- Indo-European root: sekw-