All 4 Uses

economics
in
I Am Number Four
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I have home economics after lunch—not because I necessarily care about cooking, but because it was either that or choir.†
p. 68.8 *
The nurse's station is the room beside the home economics kitchen.†
p. 340.1
Sarah leads us to the safest room she can think of, which is the home economics kitchen down the hall.†
p. 359.9
WIND FROM THE OPEN WINDOW RUSHES INTO the home economics room, the refrigerator in front of it doing little to prevent the cold air.†
p. 367.1

Definitions:

(1) (economics)
the study of how limited resources are allocated in an attempt to satisfy unlimited wants
(2) (meaning too rare to warrant focus)