OS MtSin3:16 :ܪܘܚܐ ܕܐܠܗܐ ܕܢܚܬܬ ܒܕܡܘܬܐ ܕܝܘܢܐ‏ : the divine spirit that descended looking like a dove
See the entire entry for dmū, dmūṯā n.f. likeness