That's very clearly a root. It's possible to tell even earlier than that. Roots have a very round tip, while a spike nubbin is somewhat flat and mitten shaped. In your case the entire root structure is visible, with the older part covered in white velamen and a green, actively growing tip.
Completely orchid obsessed and loving every minute of it....
Ive been misting 2 times a week and they are doing great.. i guess they dont need as much water as people say
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