ummál

Icelandic

Ummál og þvermál hrings (“Circumference and diameter of a circle”).

Etymology

From Old Norse ummál. See the Old Norse ummæli (Icelandic ummæli). Compare the Icelandic um (“around”) + mál (“measurement”) and mæla (“measure”).

Noun

ummál n (genitive singular ummáls, nominative plural ummál)

1. (mathematics) a perimeter; (sum of the distance of all the lengths of the sides of an object)
2. (mathematics) a circumference; (length of a line that bounds a circle or other two-dimensional figure)

Derived terms

• brjóstummál
• meðalbrjóstummál
• jafn að ummáli (isoperimetric)
• ummálsjafn (isoperimetric)
• ummálsjafnaðarójafna (isoperimetric inequality)
• ummálsjafnaðarverkefni (isoperimetric problem)
• ummálsmikill
• ummálsregla (half-angle formula)