'mucro' originates from Latin, specifically the word 'mucro', where 'mucro' meant 'point, tip, sword'.

'mucro' passed from Latin into Medieval/Scientific Latin and later was borrowed into English technical vocabulary (especially in botany and zoology) as 'mucro'.

Initially it meant 'point, tip, (sword point)' in Latin; over time it became specialized in English to mean a 'short sharp point or projection' in anatomical, botanical, and zoological contexts.