mythical bird of prey having enormous size and strength
"In ancient legends, a roc swooped down to snatch entire elephants from their grazing grounds in Africa."
An enormous mythical bird in Eastern legend.
"The engineer adjusted the ROC to ensure the system's stability margins were met."
Rocuronium.
Initialism of region of convergence.
In plain English: A roc is an enormous mythical bird from ancient stories that was said to be so big it could carry elephants on its back and fly across entire oceans.
"The massive roc swooped down to snatch up the small village in its talons."
Usage: This term appears almost exclusively in literary or mythological contexts and should not be used to describe large real-world birds like eagles or condors. Avoid confusing it with "rock," which is a common phonetic mix-up despite the distinct meanings.
The Royal Observer Corps, a United Kingdom defence organisation (1925 to 1992).
"The acronyms in the document are listed as either roc or R of C depending on the formatting style used by each department."
Alternative form of ROC (R of C)
The word roc entered English via the Spanish term roco, which was borrowed from an Arabic root meaning "cloud." This original sense of a cloud-like creature eventually evolved into the name for the legendary giant bird.