/pen'i trom"i teuhr/ , n.
1. a device for measuring the penetrating power of x-ray or other radiations.
2. a device for measuring the penetrability of a solid.
[ 1900-05; PENETR(ATE) + -O- + -METER ]
/pen'i trom"i teuhr/ , n.
1. a device for measuring the penetrating power of x-ray or other radiations.
2. a device for measuring the penetrability of a solid.
[ 1900-05; PENETR(ATE) + -O- + -METER ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012