Denshi Jisho — Online Japanese dictionary

クシクラゲ comb jelly (any jellyfish-like animal of the phylum Ctenophora)
Noun, Usually written using kana alone 
クチュリエ couturier
Noun, fre: 
クツワムシ Mecopoda nipponensis (species of katydid)
Noun, Usually written using kana alone 
クテノポマ climbing gourami (of genus Ctenopoma or Microctenopoma) (lat: Ctenopoma)
Noun 
クトゥルフ Cthulhu (fictional divinity created by H.P. Lovecraft)
Noun 
クマツヅラ common vervain (Verbena officinalis); common verbena
Noun, Usually written using kana alone 
クマネズミ black rat (Rattus rattus); roof rat
Noun, Usually written using kana alone 
クマヤナギ Berchemia racemosa (species of flowering plant related to buckthorn)
Noun, Usually written using kana alone 
クマンバチ 1: (Usually written using kana alone) Japanese carpenter bee (Xylocopa appendiculata circumvolans);
2: (Colloquialism) wasp; hornet; yellow jacket
Noun 
クモヒトデ 1: (Usually written using kana alone) brittle star (any starfish-like echinoderm of the order Ophiuroidea); brittlestar;
2: Ophioplocus japonicus (species of brittlestar)
Noun 
クライマー climber
Noun 
クラスター cluster
Noun 
クラッシク 1:
2: (Abbreviation) classical music; (Na-adjective) classic; classical;
3: (Noun) (the) classics
Noun 
クラビーア clavier
Noun 
クラフティ clafoutis (type of dessert)
Noun, fre: 
クラブサン clavecin
Noun, fre: 
クラミジア chlamydia
Noun, lat: 
クラリオン clarion
Noun 
クラリティ clarity
Noun 
クラリーノ Clarino (brand-name synthetic leather)
Noun 
クラレット claret
Noun 
クランポン crampon
Noun, fre: 
クラヴィア clavier
Noun 
クラヴサン clavecin
Noun, fre: 
クラーケン kraken
Noun 
クリアキー Clear key
Noun, Computer terminology 

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