n.an ancient Roman unit of length (4.85 English feet) measured as the distance from the heel of one foot to the heel of the same foot when next it touches the ground
英汉双解大词典
Roman pace
1.
N（名词）
an ancient Roman measure of length, equal to 5 Roman feet or about 58 inches (147 centimetres) 古代罗马长度单位; 约等于5个罗马尺或约58寸或147厘米 → see also geometric pace