block of ice; ice floe
Refers to a solid mass of ice, ranging from a small lump to a large floating sheet. Often used in geological or environmental contexts for ice floes.
Large ice floes are floating in the Arctic Ocean.
I took a block of ice out of the freezer and put it in my drink.
Compound of 氷 (ひょう, 'ice') and 塊 (かい, 'lump' or 'mass'). The reading is on'yomi for both characters.