乳にゅう痂かMeanings1nouncradle cap; milk crustMedical term for the yellowish, scaly patches that can appear on an infant's scalp. Used in pediatric and parenting contexts.赤あかちゃんの頭あたまに乳にゅう痂かができた。The baby developed cradle cap on its head.乳にゅう痂かは自し然ぜんに治なおることが多おおい。Cradle cap often clears up on its own.