[pur-mee-uh
ns] 
| 1. | the act of permeating. |
| 2. | the conducting power of a magnetic circuit for magnetic flux; the reciprocal of magnetic reluctance. |
| per·me·ance (pûr'mē-əns) n. A measure of the ability of a magnetic circuit to conduct magnetic flux; the reciprocal of reluctance. [From Latin permeāre, to penetrate; see permeate.] |