paraformaldehyde
noun
para·for·mal·de·hyde ˌper-ə-fȯr-ˈmal-də-ˌhīd 
-fər-,
ˌpa-rə-
: a white powder (CH2O)x that consists of a polymer of formaldehyde and is used especially as a disinfectant
Word History
First Known Use
1894, in the meaning defined above
Medical Definition
paraformaldehyde
noun
para·form·al·de·hyde ˌpar-ə-fȯr-ˈmal-də-ˌhīd, -fər-
: a white powder (CH2O)x that consists of a polymer of formaldehyde and is used especially as a fungicide