[uh b-ses] /əbˈsɛs/
verb (used with object)
to dominate or preoccupy the thoughts, feelings, or desires of (a person); beset, trouble, or haunt persistently or abnormally:
Suspicion obsessed him.
verb (used without object)
to think about something unceasingly or persistently; dwell upon something.
(transitive; when passive, foll by with or by) to preoccupy completely; haunt
(intransitive; usually foll by on or over) to worry neurotically or obsessively; brood
c.1500, “to besiege,” from Latin obsessus, past participle of obsidere “watch closely; besiege, occupy; stay, remain, abide” literally “sit opposite to,” from ob “against” (see ob-) + sedere “sit” (see sedentary). Of evil spirits, “to haunt,” from 1530s. Psychological sense is 20c. Related: Obsessed; obsessing.
- Occipital vein
occipital vein n.
occipito- pref. Occiput; occipital: occipitofrontal.
- Occipitoanterior position
occipitoanterior position oc·cip·i·to·an·te·ri·or position (ŏk-sĭp’ĭ-tō-ān-tēr’ē-ər) n. A cephalic presentation of the fetus with the occiput turned toward either the right or left front quarter of the mother’s pelvis.
occipitofacial oc·cip·i·to·fa·cial (ŏk-sĭp’ĭ-tō-fā’shəl) adj. Of or relating to the occiput and the face.