Resembling or relating to chlorine; having characteristics similar to chlorine or a chlorine compound.
From chlor- (from chlorine) + -oid 'resembling or having the form of'. This adjective entered English chemistry vocabulary in the mid-19th century.
The suffix '-oid' means 'resembling,' so 'chloroid' describes chemicals that act like chlorine or have chlorine-like properties even if they don't contain actual chlorine atoms—it's a shorthand way chemists describe how something behaves.
Complete word intelligence in one call. Free tier — 50 lookups/day.