1. an ancient Roman unit of weight equal to one-twelfth of a pound
Usage: historical
2. an ancient Roman unit of measurement equal to one-twelfth of a foot
Usage: historical

Examples

• The Roman uncia was approximately 27 grams in weight.
• Ancient Roman coins were often measured in unciae.
• One uncia equaled about 2.46 centimeters in length.
• The word ‘ounce’ derives from the Latin uncia.
• Roman architects used the uncia as a standard unit of measurement.
• Twelve unciae made up one Roman pound or libra.