Definition of top copy in English:
The original typed or handwritten copy of a letter or document of which carbon copies have been made.
- In addition, by this time the top copy and the file copy of the referral letter, and the envelope addressed to Morriston Hospital, had been placed in the file and were included in the file as sent for the record.
- When staff were again busy he would tear the top copy off and drop the carbon copy over the counter.
- Dashed lines joining the two gene duplicates indicate the potential intron loss in the bottom copy relative to the top copy.