natural rubber
— Noun
– English
～ an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
numdah rug
— Noun
– English
～ an embroidered rug made from a coarse Indian felt
Naegele's rule
— Noun
– English
～ rule for calculating an expected delivery date; subtract three months from the first day of the last menstrual period and add seven days to that date