| 1667 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1921 | A New Dictionary of Kanji Usage |
| 90 | Classic Nelson (Andrew Nelson) |
| 1882 | Essential Kanji (P.G. O’Neill) |
| 1086 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 323 | Japanese Names (P.G. O’Neill) |
| 1892 | Kanji and Kana (Spahn and Hadamitzky) |
| 2068 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1921 | Kanji in Context (Nishiguchi and Kono) |
| 175 | Kodansha Compact Kanji Guide |
| 4298 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2174 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2928 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 34 | Les Kanjis dans la tete (Yves Maniette) |
| 1809 | Morohashi |
| 3486 | New Japanese English Character Dictionary (Jack Halpern) |
| 443 | New Nelson (John Haig) |
| 34 | Remembering The Kanji (James Heisig) |
| 34 | Remembering The Kanji, 6th edition (James Heisig) |
| 1040 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in junior high
JLPT level N1
2143 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 凸 【トツ】 convex
- 凸凹 【デコボコ】 unevenness, roughness, ruggedness, bumpiness, inequality, imbalance, unevenness, difference
- 凹凸 【オウトツ】 unevenness, bumpiness, roughness, ruggedness, imbalance, inequality, unevenness, disparity
- 両凸 【リョウトツ】 biconvex
Kun reading compounds
- 凸 【でこ】 brow, forehead, bump
- 凸凹 【でこぼこ】 unevenness, roughness, ruggedness, bumpiness, inequality, imbalance, unevenness, difference
Readings
- Korean:
- cheol, dol
Spanish
- convexo
- desigual
Portuguese
- convexo
- ímpar
French
- convexe
- inégal
- gros sourcils
| 3675 | 2001 Kanji |
| 0a5.13 | The Kanji Dictionary |
| 4-5-1 | SKIP code |
| 4-6-1 | SKIP code |
| 4-4-1 | SKIP code |
| 7777.7 | Four corner code |
| 1-38-44 | JIS X 0208-1997 kuten code |
| 51f8 | Unicode hex code |
Jōyō kanji, taught in grade 2
JLPT level N2
805 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 角 【カク】 angle, square, cube, bishop, third degree (of the Japanese and Chinese pentatonic scale), Chinese "horn" constellation (one of the 28 mansions), jiao (monetary unit of China; one-tenth of a yuan)
- 角界 【カクカイ】 the world of sumo
- 内角 【ナイカク】 interior angle, internal angle, inside corner
- 外角 【ガイカク】 external angle, exterior angle, outside corner
Kun reading compounds
- 角 【かど】 corner, edge, (street) corner, turning, rough edges (of one's character, words, etc.), abrasiveness, harshness, sharpness
- 角地 【かどち】 corner lot
- 四つ角 【よつかど】 four corners, crossroads, intersecting street, street corner
- 塩角 【しおかど】 sharp taste of (refined) salt
- 角 【つの】 horn, antler, antenna, feeler, tentacle (e.g. of a snail), horn-like projection (e.g. peaks of whipped cream)
- 角隠し 【つのかくし】 bride's head-dress
- 枝角 【えだづの】 antler
- 豊穣の角 【ほうじょうのつの】 cornucopia, horn of plenty
Readings
- Japanese names:
- い、 す、 すみ、 ずみ、 ふさ
- Korean:
- gag
Spanish
- ángulo
- esquina
- cuadrado
- cuerno
Portuguese
- ângulo
- canto
- chifre
French
- angle
- coin
- carré
- corne
- bois (andouillers)
| 173 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 97 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 243 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 714 | A New Dictionary of Kanji Usage |
| 4301 | Classic Nelson (Andrew Nelson) |
| 273 | Essential Kanji (P.G. O’Neill) |
| 891 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 547 | Japanese Names (P.G. O’Neill) |
| 473 | Kanji and Kana (Spahn and Hadamitzky) |
| 481 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 716 | Kanji in Context (Nishiguchi and Kono) |
| 1650 | Kodansha Compact Kanji Guide |
| 2541 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1293 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1761 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1829 | Les Kanjis dans la tete (Yves Maniette) |
| 35003 | Morohashi |
| 2047 | New Japanese English Character Dictionary (Jack Halpern) |
| 5543 | New Nelson (John Haig) |
| 1812 | Remembering The Kanji (James Heisig) |
| 1953 | Remembering The Kanji, 6th edition (James Heisig) |
| 138 | Tuttle Kanji Cards (Alexander Kask) |
| 2545 | 2001 Kanji |
| 2n5.1 | The Kanji Dictionary |
| 2-2-5 | SKIP code |
| 3-4-3 | SKIP code |
| 2722.7 | Four corner code |
| 1-19-49 | JIS X 0208-1997 kuten code |
| 89d2 | Unicode hex code |