vel
vel — 縮寫
1. a written abbreviation for 'velocity', used in scientific and technical writing
速度；速率
velocity 的書面縮寫
a written abbreviation for 'velocity', used in scientific and technical writing to indicate how fast something is moving, often in a particular direction or measured at a specific moment.
The radar gun recorded a peak vel of 98 mph for the pitcher's fastball.
測速槍記錄到該投手快速球的最高速度達每小時 98 英里。
abbreviation used with 'peak' in sports context
In the lab report, the column labeled vel showed the toy car's speed at each timing gate.
實驗報告中標示為 vel 的那一欄，顯示了玩具車經過每個計時閘門時的速度。
abbreviation used in data table column headers
The seismograph recorded a maximum ground vel of 45 cm per second during the aftershock.
地震儀記錄到本次餘震期間的最大地表速度為每秒 45 公分。
Ignacio calculated the average river vel by timing a floating object between two points.
Ignacio 利用漂浮物在兩點之間的漂流時間，計算出河流的平均流速。
The car's vel dropped sharply before the driver applied the brakes at the last corner.
駕駛在最後一個彎道踩下煞車之前，車輛的速度驟然下降。
- speed
A more common, everyday word. Unlike 'velocity', 'speed' does not imply a particular direction. Vel in scientific use nearly always refers to velocity with direction.
- velocity
The full word that 'vel' abbreviates. Use 'velocity' in formal prose and speech; reserve 'vel' for tables, labels, and informal technical notes.
- v
The standard mathematical symbol for velocity (e.g., v = d/t). Both 'vel' and 'v' appear in formulas, but 'vel' is more common in data tables and written reports.
用法筆記
Vel appears almost exclusively in written technical contexts — data tables, formulas, graphs, and lab reports. In spoken English, the full word 'velocity' is always used instead. Common in baseball analytics (pitch speed), physics education, automotive testing, and meteorology.