Dreadnought

...Both ships used special steel for their armor, which was more bullet-resistant than iron or mild steel, and as a result of this weight reduction, they were able to be equipped with high-horsepower engines to increase their speed and to carry larger amounts of weapons and ammunition.
[The Birth of the Super Battleship]
In 1906, Britain built the Dreadnought (17,900 tons) based on lessons learned from the Battle of Tsushima. This was called a Dreadnought-class battleship, and was considered an innovative battleship in that it adopted steam turbines to double its power output, increased the number of main guns, eliminated secondary guns, and placed turrets on the centerline of the ship as much as possible, allowing it to fire simultaneously from bow to stern and across the ship.

*Some of the terminology that mentions "Dreadnought" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…両艦は防御装甲に鉄や軟鋼より耐弾力が強い特殊鋼を使用したが，これによる重量軽減の結果，大馬力の機関を搭載して速力を増し，兵器や弾火薬の搭載量も増大させることができた。
［ド級戦艦の誕生］
　1906年イギリスは日本海海戦の戦訓を取り入れて，〈ドレッドノートDreadnought〉(1万7900トン)を建造した。これはド(弩)級戦艦と呼ばれ，蒸気タービンを採用して出力を2倍程度に高め，また主砲を増加させて副砲は全廃し，かつ砲塔は極力艦の中心線上に配置して，艦首尾および艦横方向へ斉射できるようにした点で革新的戦艦と目された。…

※「Dreadnought」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報