Longman Dictionary of Contemporary English homepage

Topic: MATHS

Date: 1500-1600
Language: Greek
Origin: heptagonos, from hepta 'seven' + gonia 'angle'

heptagon

noun
     
hep‧ta‧gon [countable]
CF a shape with seven straight sides
heptagonal adjective
Word of the Day
The MATHS
Word of the Day is:

Other related topics