诱发反应测定器

Erd \Erd\ ([~e]rd), n. [OE. erd, eard, earth, land, country, AS.
eard; akin to OS. ard dwelling place, OHG. art plowing,
tillage, Icel. ["o]r[eth] crop, and to L. arare to plow, E.
ear to plow.]
The earth. [Prov. Eng.] --Wright.

{Erd shrew} (Zo["o]l.), the common European shrew ({Sorex
vulgaris}); the shrewmouse.