convex vs crescent

convex

adj
  • Curved or bowed outward like the outside of a bowl, circle, or sphere. 

  • arranged such that for any two points in the set, a straight line between the two points is contained within the set. 

  • having no internal angles greater than 180 degrees. 

  • having an epigraph that is a convex set. 

noun
  • A playing card made convex for use in cheating. 

  • A small convex mirror used to cheat by observing other players' cards. 

  • Any convex body or surface. 

crescent

adj
  • Shaped like a crescent. 

noun
  • A curved street, often presenting a continuous façade, as of row houses. 

  • A representation of crescent used as a symbol of Islam. 

  • The emblem of the waxing Moon with horns directed upward, when used in a coat of arms; often used as a mark of cadency to distinguish a second son and his descendants. 

  • The figure of the moon as it appears between its first or last quarter and the new moon, with concave and convex edges terminating in points. 

  • A curved pastry. 

  • A crescent spanner. 

  • Any of three orders of knighthood conferred upon foreigners to whom Turkey might be indebted for valuable services. 

  • A crescentspot butterfly. 

verb
  • To form a crescent shape 

  • To decorate with crescents. 

How often have the words convex and crescent occurred in a corpus of books? (source: Google Ngram Viewer )