Yes you are correct with organic traffic this comes from organic searches and hits on your site, people entering the URL and going direct to your site is known as direct traffic, and then you have referral traffic which basically can come from any other site such as social referral, traffic from an app etc or even referrals from Google maps, shopping etc.

You could call organic / referral and direct all natural traffic if you was comparing it to fake traffic to your site or even search bot visits.

Hope that helps.