freezing weather; cold weather
Literary or somewhat formal term for very cold weather; in everyday speech 寒い天気 is more common.
It's tough waiting outside in this freezing weather.
agar-agar; vegetable gelatin
A jelly-like substance made from seaweed, used in Japanese sweets and cooking.
I made jelly using agar-agar.
寒天 is a firmer, agar-based jelly dessert, whereas ゼリー is typically softer and made with gelatin or pectin.
Standard kanji spelling for both the weather and food senses.
From Chinese 寒天 (hántiān, 'cold weather'). The food sense arose in Japan from the resemblance of the solidified substance to frozen water.