PICOGRAM
Meaning of PICOGRAM in English
Pronunciation: ' p ē -k ō - ˌ gram, -k ə -
Function: noun
Etymology: International Scientific Vocabulary
Date: 1951
: one trillionth of a gram
Merriam Webster Collegiate English Dictionary.
Merriam Webster - Энциклопедический словарь английского языка.
2012