umbos is umbo's Plural Form

umbo

US 
UK 
  • n.盾心浮雕;【动】(两瓣贝的)壳顶;盾顶;【解】(中央)凸
Plural Form:umbos  Plural Form:umbones  
n.
1.
盾心浮雕
2.
【动】(两瓣贝的)壳顶;盾顶;【解】(中央)凸,鼓膜凸;【植】(菌盖的)中心突起

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard