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ACROSS
1)  the income or profit arising from such transactions as the sale of land or other property
2)  the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
3)  the process whereby heat changes something from a solid to a liquid
4)  a watery solution of sugars, salts, and minerals that circulates through the vascular system of a plant


DOWN
1)  an antacid
2)  a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
3)  large brown seaweeds having fluted leathery fronds
4)  informal terms for a meal

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