agrin

1. not comparablepredicativeGrinning; having happiness or satisfaction apparent on one's face.

   2 more examples

   Yea, let her see me fall! and with that I drave Among the thickest and bore down a Prince, And Cyril, one. Yea, let me make my dream All that I would. But that large-moulded man, His visage all agrin as at a wake, Made at me through the press, and, staggering back With stroke on stroke the horse and horseman, came As comes a pillar of electric cloud, Flaying the roofs and sucking up the drains, And shadowing down the champaign till it strikes

   1847, Alfred Tennyson, The Princess

   When a ray from a lantern (the three pedestrians of the party carried each one) fell on Mr. Moore's face, you could see an unusual, because a lively, spark dancing in his eyes, and a new-found vivacity mantling on his dark physiognomy; and when the rector's visage was illuminated, his hard features were revealed all agrin and ashine with glee.

   1849, Currer Bell [pseudonym; Charlotte Brontë], “Mr. Yorke”, in Shirley. A Tale. […], volume I, London: Smith, Elder and Co., […], →OCLC, page 47

plural agrins

1. medicinea protein involved in the formation of neuromuscular junctions during embryonic development