单词	umbo
释义	umbo noun um·​bo ˈəm-(ˌ)bō  plural umbones ˌəm-ˈbō-(ˌ)nēz  or umbos 1 : the boss of a shield 2 : a rounded elevation: such as a : an inward projection of the tympanic membrane of the ear b : one of the lateral prominences just above the hinge of a bivalve shell umbonal ˈəm-bə-nᵊl  ˌəm-ˈbō-  adjective umbonate ˈəm-bə-ˌnāt  ˌəm-ˈbō-nət  adjective Illustration of umbo U umbo 1 Word History Etymology Latin; akin to Latin umbilicus — more at navel First Known Use 1721, in the meaning defined at sense 1 Medical Definition umbo noun um·​bo ˈəm-(ˌ)bō  plural umbones ˌəm-ˈbō-(ˌ)nēz  or umbos : an elevation in the tympanic membrane of the ear
随便看	alternatives alternativity alternativo alternator alternators alternats alterne alternes alterni- alterocentric alters alterum althaea althaeas althaein altheas althein altho althoer althoest althorn althorns although althougher althoughest

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