acumen C2 Topic:Word Formation & Derivatives US /əˈkjumən/ UK /ˈækjʊmən/ See IPA manual Freq #39171 Meanings 1 noun A bony, often sharp, protuberance, especially that of the ischium. The rostrum is the anterior extension of the carapace between the eyes. It ends in a more or less acute tip, or acumen, and may have a lateral spine on each side or bear a longitudinal keel (carina) on the dorsal surface. Simplified etymology Acumen was adopted in the late 16th century from Latin acumen, meaning “sharpness” or “point,” derived from acuere, meaning “to sharpen.” Etymology Borrowed from Latin acūmen (“sharp point”). Topics Word Formation & Derivatives General Vocabulary External links Google Images Cambridge Dictionary Wiktionary # acumen **Type:** Word **Level:** C2 **Part of speech:** noun **IPA (US):** /əˈkjumən/ **IPA (UK):** /ˈækjʊmən/ **Frequency rank:** 39171 ## Meanings 1. A bony, often sharp, protuberance, especially that of the ischium. ## Examples - The rostrum is the anterior extension of the carapace between the eyes. It ends in a more or less acute tip, or acumen, and may have a lateral spine on each side or bear a longitudinal keel (carina) on the dorsal surface. ## Etymology Borrowed from Latin acūmen (“sharp point”). ## Topics - Word Formation & Derivatives - General Vocabulary markdown