noun
submarine-launched ballistic missile; SLBM
Technical military term; often abbreviated as SLBM in English contexts.
潜水艦発射弾道ミサイルは核抑止力の重要な要素だ。
Submarine-launched ballistic missiles are a key element of nuclear deterrence.
Compound of 潜水艦 (submarine) + 発射 (launch) + 弾道 (ballistic trajectory) + ミサイル (missile).