sec·ond-line 
(sĕkənd-lĭn)
(sĕkənd-lĭn)adj.
1. Relating to or being a secondary stage of something: the body's second-line defense against infection.
2. Being a drug or therapy that is used to treat a condition or disease only after another drug or therapy has been used or considered.
3. Of or relating to second-line jazz.
- go there
- go the rounds
- go the vole
- go the way of all flesh
- Gothic
- Gothically
- Gothic arch
- Gothicism
- Gothicize
- Gothic revival
- go through
- go through the hoop
- go through the motions
- go through the roof
- Gotland
- go-to
- go to bat for
- go to bed with
- go to extremes
- go to head
- go to it
- go to (one's) head
- go to one's head
- go to pieces
- go to press