picosecond
构词拆分
pico-前缀
“metric prefix”
In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10−12 (short scale trillionth or long scale billionth). · (biology) Used to designate sizes, especially, of cells, smaller than those prefixed by nano- or micro-; sized between 0.2 and 2.0 μm.
+
second词根/词干
词源说明
释义（英文）
词族
派生词（1）