Definition of pin-eyed in US English:

pin-eyed

adjective

Botany Horticulture
  • Of a heterostylous plant (especially one of the genus Primula) or its flowers: having a long style so that the stigma is visible at the mouth of the corolla tube, with the stamens inserted lower down. Opposed to "thrum-eyed".

Origin

Early 19th century; earliest use found in George Crabbe (1754–1832), poet and Church of England clergyman. From pin + eyed.

Pronunciation

pin-eyed

/ˈpɪnʌɪd/