het·er·oe·cious 
(hĕt′ə-rēshəs)
(hĕt′ə-rēshəs)adj.
Spending different stages of the life cycle on different, usually unrelated hosts. Used of parasites.
[HETERO- + Greek oikiā, house; see weik-1 in the Appendix of Indo-European roots + -OUS.]
het′er·oecism (-sĭz′əm) n.
- keep a stiff upper lip
- keep at
- keep a weather eye open
- keep chin up
- keep company
- keep company
- keep down
- keep end up
- keeper
- keep eyes open
- keep eyes peeled
- keep fingers crossed
- keep head
- keep/hold (one's) peace
- keeping
- keep/know (one's) place
- keep kosher
- keep nose clean
- keep nose to the grindstone
- keep off
- keep (one's) chin up
- keep one's chin up
- keep one's end up
- keep one's eyes open
- keep (one's) eyes open/peeled