Continuing with Singing in Style by Martha Elliott, subtitled A Guide to Vocal Performance Practices:
Isn't this the coolest thing! I swear I've never heard of this. Caccini described an ornament where you start a third or fourth below the written pitch and slide up to the real note. Another guy calls this cercar della nota (searching for the note). This is an actual thing. Doesn't that sound like a scoop to you? Who knew?
For a description of a scoop see here. For Part I see here.