hoˈrrisonous,a. [f. L. horrison-us (f. stem of horrēre + -sonus sounding) + -ous.] =prec. 1631Celestina vii. 84 Words of most horrisonous roaring.1901Daily Chron. 31 Dec. 5/1 Sophie oft wakes on my snorting horrisonous.1962L. Deighton Ipcress File xv. 91, I listened to the ululating wail and horrisonous mewl.