Denshi Jisho — Online Japanese dictionary

レードル cradle
Noun, Computer terminology 
レーマー claimer; claimant
Noun 
ロアゲハ spangle (species of black swallowtail butterfly, Papilio protenor)
Noun, Usually written using kana alone 
ロウラー (Web) crawler
Noun, Computer terminology 
ロカジキ Indo-Pacific blue marlin (Makaira mazara)
Noun, Usually written using kana alone 
ロガラシ black mustard (Brassica nigra)
Noun, Usually written using kana alone 
ロキヅタ Caulerpa scalpelliformis (species of green alga)
Noun, Usually written using kana alone 
ログワイ 1: (Usually written using kana alone) Eleocharis kuroguwai (species of spikerush);
2: (Usually written using kana alone) Chinese water chestnut (Eleocharis dulcis var. tuberosa)
Noun 
ロケット 1: croquet;
2: croquette
Noun 
ロスグリ black-currant (Ribes nigrum); cassis
Noun 
ロスセル cross-selling (selling other products to a customer); cross sell
Noun 
ロスバー crossbar
Noun 
ロスボウ crossbow
Noun 
ロスボー crossbow
Noun 
ロゼット closet
Noun 
ロソイド clothoid
Noun 
ロッカス crocus
Noun 
ロッキー sketch (fre: croquis); rough draft
Noun 
ロッケー croquet
Noun, fre: 
ロツグミ Japanese thrush (Turdus cardis)
Noun, Usually written using kana alone 
ロナマコ black sea cucumber (Holothuria atra)
Noun 
ロマキー chroma key
Noun, Computer terminology 
ロマグロ Pacific bluefin tuna (edible fish, Thunnus orientalis)
Noun, Usually written using kana alone 
ロマチン chromatin
Noun 
ロラミン chloramine
Noun 
ロラール chloral (CCl3CHO); trichloroethanal
Noun 

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