jquery ajax call metho instead of method

Question

I have a script.js that uses jQuery's ajax function to query string to a php file, it works as expected BUT i find it odd that i must use the "metho" sintax instead of the "method", look at this,

this works

script.js

    $.ajax({
    url: 'php/printers.php',
    metho: 'POST',
    data: {
        data: c,
        orderby: d,
        },
    success: function(output) {

        $('.results').html(output);

        var tbody = document.getElementsByClassName('results');
        var rows = tbody[0].getElementsByTagName('tr');     

        ajax.applyClass(rows);  
    }
});

this doesn't

    $.ajax({
    url: 'php/printers.php',
    method: 'POST',
    data: {
        data: c,
        orderby: d,
        },
    success: function(output) {

        $('.results').html(output);

        var tbody = document.getElementsByClassName('results');
        var rows = tbody[0].getElementsByTagName('tr');     

        ajax.applyClass(rows);  
    }
});

i'm preplexed that i must use the "metho" instead "method" :O i don't even know how that happened, though it was a typo??