na-adjective
Describes something that appeals to physical senses, often with an erotic or arousing quality. Used for people, voices, atmospheres, art, etc.
彼女の官能的な声に、誰もが聞き惚れた。
Everyone was captivated by her sensual voice.
その映画は官能的なシーンが多い。
That movie has many sensual scenes.
エロチック is closer to 'erotic' and often more explicitly sexual, whereas 官能的 can describe a broader, more aesthetic sensuality.
Compound of 官能 (senses, sensuality) + 的 (-like, -tic). 官能 is from Middle Chinese 官能, originally meaning 'official function', later shifting to 'sensory faculty' in Japanese.