to remain silent or hold oneself aloof in a sullen, ill-humored, or offended mood: Promise me that you won't sulk if I want to leave the party early. a state or fit of sulking. sulks, ill-humor shown by sulking: to be in the sulks. Also, sulker. a person who sulks.
Some cite the fact that secretions from the millipede repel other insects as a reason why they are beneficial. While millipedes do not bite, the sight of them can still be unnerving, especially when they appear in large numbers. They have the ability to crawl up walls and enter homes through small openings.
1 Millipede: mille means thousand; pede means feet. 2  Centipede: centi means hundred; pede means feet. 3  A detritivore such as the millipede is an herbivore that eats decaying plant material.  Millipedes have four legs per body segment; centipedes have two.