The more interesting fact is not that she was a woman, but she was an accomplished Hollywood actress with no formal training that went on to invent the channel-hopping technology used in Wifi, Bluetooth and military radar installations, among other inventions.

And she's also a headcrab. A true polymath.

Which dictionary does one need to consult for a positive definition of headcrab?

Lamarr is the name of a crab-like alien pet in the game Half Life 2, its species known as headcrab.

Modern 802.11 versions don‘t really use spread-spectrum anymore (neither FHSS, which is used by some versions of Bluetooth, nor DSSS, which was used in the original 802.11 and up to 802.11b), but rather OFDM on fixed carrier frequencies.

Switching channels due to DFS is not "frequency hopping" in that sense – that would be many orders of magnitude faster.