名词吠声，啼声，嗥（声）
1. 吠声：ululate 叫 | ululation 吠声 | umbel 伞状花序
2. 嚎叫：ultromotivity 自动力 | ululation 嚎叫 | umbilical cord 脐带
3. 啼声：ululant 吠的 | ululation 啼声 | ululation 吠声
4. 吠声/啼声/泣声：ululate /啼/叫/鸣/悲泣/ | ululation /吠声/啼声/泣声/ | ulvospinel /钛尖晶石/
noun
1. ululation的意思
1. a long loud emotional utterance
e.g. he gave a howl of pain
howls of laughter
their howling had no effect