also: さっか
noun
Botanical term for a dry fruit that splits open when ripe to release seeds.
ケシの実は蒴果の中にできる。
Poppy seeds develop inside a capsule.
この植物の蒴果は熟すと裂ける。
The capsule of this plant splits open when ripe.
The term is composed of 蒴 (a kind of pod or capsule) and 果 (fruit). The reading さく is the on'yomi of 蒴, and か is the on'yomi of 果. The alternate reading さっか results from gemination.