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	typer types typescript typescripts typeset typesets typesetter typesetters typesetting typesetting machine typesettings typestyle typestyles typewrite typewriter typewriters typewrites typewriting typewriting telegraph typewritings typewritten typewrote typey typh- typha

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