It wasn't that I had no idea what -oid meant (humanoid etc. made it fairly obvious), it was just that seeing it spelled out explicitly made me make a connection

It wasn't that I had no idea what -oid meant (humanoid etc. made it fairly obvious), it was just that seeing it spelled out explicitly made me make a connection I hadn't before. Similarly with Android -- never realized it's andro (man) + [o]id.