Denshi Jisho — Online Japanese dictionary

1: greens; vegetables;
2: rape (Brassica napus); rapeseed
Common word, Noun 
さい side dish
Noun 
なぎ Monochoria korsakowii (species of flowering plant)
Noun, Archaism 
ふき giant butterbur (Petasites japonicus); Japanese sweet coltsfoot
Noun, Usually written using kana alone 
なたね rapeseed; coleseed
Common word, Noun 
なっぱ greens; vegetable leaves; leaf vegetable
Noun 
なめし rice boiled with greens
Noun 
っ葉 なっぱ greens; vegetable leaves; leaf vegetable
Noun 
漬け なづけ pickled vegetables
Noun 
さいえん vegetable garden
Common word, Noun 
さいたん menu (at a Chinese restaurant)
Noun 
さいたん menu (at a Chinese restaurant)
Out-dated kanji, Noun 
さいばし cooking or serving chopsticks
Noun 
なたねな rape (seed oil plant, Brassica campestris)
Noun, Usually written using kana alone 
の花 なのはな rape blossoms; Brassica rapa var. amplexicaulu
Noun 
さいしょく vegetable diet
Common word, Noun, Suru verb, No-adjective 
種殻 なたねがら rapeseed hulls
Noun 
葉服 なっぱふく (light blue) overalls; workman's overalls
Noun 
種梅雨 なたねづゆ long spell of rain in early spring
Noun 
っ葉服 なっぱふく (light blue) overalls; workman's overalls
Noun 
種油 なたねあぶら rapeseed oil; canola oil
Noun 
食主義 さいしょくしゅぎ vegetarianism
Noun, No-adjective 
切り包丁 なきりぼうちょう nakiri bocho, var. of Japanese knife used for cutting vegetables
Noun 
食主義者 さいしょくしゅぎしゃ vegetarian
Noun 

You can also

Look up kanji details for 菜.

Try a Yahoo Jisho search for 菜 .
Try a Goo Jisho search for 菜 .
Try a Google search for 菜 .