not to nit pick but a MOULD is a device to form an object into a shape (which is why I use this spelling when I speak about my wooden perfecto cigar mould ) ,this word has been Americanized into MOLD,which is wrong. MOLD is the tiny white/gray/blueish green fungal growth caused by warmth and moisture on the leaf over an extended period of time.
Kind of like how the wood edge joinery known as the rabbet has been wrongly spelled as rabbit ,and the dish commonly known as welsh rabbit is correctly welsh RAREBIT since there is no rabbit , it is actually cheese. that is all for my daily random bit of useless information, we now continue with our regularly scheduled program.
http://english.stackexchange.com/questions/27542/mold-vs-mould
http://english.stackexchange.com/questions/27542/mold-vs-mould
Same as the brits use the spelling colume, while Americans use the word column. No difference. Same with colour and color.