the.com/genetic code

means The set of rules by which sequences of DNA (via triplets of nucleotide bases called codons) are translated into the amino acids that build proteins.

from 'Genetic' traces back to Greek 'genesis,' meaning origin or birth. 'Code' comes from Latin 'codex,' originally a block of wood split into writing tablets, later a book of laws — which is exactly the metaphor scientists reached for in the 1950s-60s when they realized DNA's four-letter alphabet was being read in triplets to spell out proteins. The phrase itself is a 20th-century scientific coinage, born directly from the cryptography-obsessed, information-theory language of that era — researchers quite literally thought of life as a message to be decoded.