Thanks for the replies. PAXBOY - the definition you quote, from the autogyro page, agrees with what I thought... it's the single line that I quoted, from the main "airplane" page, that's wrong, and indeed is inconsistent with the definition on the autogyro page that you've quoted.
I'll submit a revision...
I\'ve changed the sentence to read:
Helicopters and autogyros use a spinning rotor (a rotary wing) to provide lift; helicopters also use the rotor to provide thrust.
The change is already visible
here, which will cause no end of confusion to people reading my first post from now on...
