砡

It names a stone heap with a level top.

Ma Rong’s Han-era poem 長笛賦 uses 頵砡 for stones packed together to a person’s height. Later lexicons—玉篇 and 廣韻—keep the physical sense, glossing 砡 as “level” and “level at the top.” The character is not recorded in 說文.

The left part is 石, the character for stone. The right part 玉 helps indicate sound in the character’s historical phonetic series; it does not make 砡 mean jade.

What does 砡 mean in Japanese?

Japanese dictionaries list it with the reading そろえる.

That Japanese verb means “to put things in order” or “line them up.” The same reference entry also lists ごく and ぎょく, readings inherited through Chinese. It classifies 砡 as a hyōgai kanji—outside Japan’s standard-use kanji list—so this is a specialist dictionary reading, not a sign of everyday use.