noun
insect net; mosquito net
A net used to keep insects out, such as a mosquito net or a fine mesh screen for windows and doors.
夏は窓に防虫網を張って蚊が入らないようにしている。
In summer, I put up insect netting on the windows to keep mosquitoes out.
Compound of 防虫 (bōchū, 'insect protection') and 網 (mō, 'net').