diameter
/daɪˈæmɪtə(r)/noun
1
- a straight line passing from side to side through the centre of a body or figure, especially a circle or sphere（尤指圆或球体的）直径。
1.1
- the length of this line直径长。
1.2
- a transverse measurement of something; width or thickness.横度; 宽度; 厚度。
2
- a unit of linear measurement of magnifying power放大倍数。
派生词
diametral
adjective词源
late Middle English: from Old French diametre， via Latin from Greek diametros （grammē） (line) measuring across， from dia 'across' + metron 'measure'.