Japanese

Noun

氷花 ‎(hiragana ひょうか, romaji hyōka, historical hiragana ひょうくわ)

1. phenomenon of water freezing on trees and other plants, causing them to appear as if they have white flowers that are made of ice

References

1. ↑ 2006, 大辞林 (Daijirin), Third Edition (in Japanese), Tōkyō: Sanseidō, ISBN 4-385-13905-9