olfac'toiy

[L. olfacius; olfacere, to smell.] Relating to the sense of smell, o. a'rea, the area embracing the locus perforatus anterior, the trigonum olfactorium, the anterior part of the callosal gyrus, and the uncus. 0. bulb, the swollen anterior extremity of the o. tract, o. bundle, a bundle of fibers in the fornix which pa in front ^ of the anterior commi ure and enter the septum lucidum, going finally to the subcallosal gyrus and the locus perforatus anterior, where they divide and pa to the olfactory tract and the uncus, o. gan'glion, a collection of neuroblasts in the embryo, the peripheral proce es of which form the o. nerves, o. lobe, lab us olfact or i us. o. lobule, one of the two parts, an erior and posterior, of the o. lobe. 0. nerve, the first cranial nerve, nervus olfact or i us. o. striae, see stria, u. sulcus, see sulcus, o. tract, tractus olfact or i us. o. tri'go me, o. tu'bercle, trigonum olfactorium.