The R in a Labratory’s R&d
Puzzle 10 of Alternatives to Plastic Pack
Question is: The R in a Labratory’s R&d
and the answer is: RESEARCH
Word Meaning:
RESEARCH — (uncountable, countable in some dialects) Diligent inquiry or examination to seek or revise facts, principles, theories, applications, etc. (that are currently available, or that are familiar to one's self).
Definitions from Wiktionary.