Although I can't answer exactly what it is, it is just a cell and tissue culture created to test products for skin irritancy. It is an alternative to animal testing for things like skin-care products-- if it were an animal, its fur would be shaved, and the substance would be applied (often after the skin is abraised to increase absorption).

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 6 words with the pattern --RI-AN--. That is, nine letter words with 3rd letter R and 4th letter I and 6th letter A and 7th letter N. In alphabetical order, they are:

arrivance

arrivancy

biriyanis

irritancy

irritants

puritanic

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --R-T-NC-. That is, nine letter words with 3rd letter R and 5th letter T and 7th letter N and 8th letter C. In alphabetical order, they are:

irritancy

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -RR-T--C-. That is, nine letter words with 2nd letter R and 3rd letter R and 5th letter T and 8th letter C. In alphabetical order, they are:

irritancy

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 14 words with the pattern I--I----Y. That is, nine letter words with 1st letter I and 4th letter I and 9th letter Y. In alphabetical order, they are:

illicitly

imminency

impiously

indigency

indignify

indignity

infirmary

infirmity

insipidly

inviolacy

invisibly

irrigably

irritably

irritancy