cucullus [kju'kʌlәs]
n.
修士之兜帽
Cucullus \Cu*cul"lus\, n.; pl. {Cuculli}. [L., a hood.]
1. (Bot.) A hood-shaped organ, resembling a cowl or monk's
hood, as certain concave and arched sepals or petals.
[Webster 1913 Suppl.]
2. (Zo["o]l.) A color marking or structure on the head
somewhat resembling a hood.
[Webster 1913 Suppl.]