occludern.

1927 Proc. Royal Soc. B. 101 280 The afferent peroneal nerve is an extremely powerful occluder, perhaps especially in semitendinosus muscle.

1953 Science 11 Sept. 297/1 Occluders both of Cu and Zn.

1985 Proc. National Acad. Sci. U.S.A. 82 8747/2 An inflatable balloon occluder or a permanent snare occluder was placed around the proximal left descending coronary artery.

1993 Guardian 28 Sept. (Educ. section) 12/4 All mechanical [heart] valves have an occluder, around which the blood must flow.

1999 N. Spinrad Greenhouse Summer (2000) vii. 160 Create and maintain a vast orbital ring of finely divided dust to reduce oncoming sunlight. Or do it with gigantic mylar occluders.

2000 Children's Newspaper Day (Denver Post) 15 Oct. (Children's Hosp. Suppl.) 7/4 Devices called ASD and VSD occluders..are made of a nickel/titanium alloy mesh, which enables them to be shaped to the exact size of the hole in a patient's heart wall.

1930 Brit. Jrnl. Ophthalmol. 14 520 Many varieties of occluder..have been devised.

1949 S. Duke-Elder Text-bk. Ophthalmol. IV. xlv. 3917 For older children who can be trusted not to peep round it, a simple occluder of metal..or rubber..may be attached to the spectacles... These should be replaced by strapping on a tie-on occluder during the night.

1974 Nature 11 Oct. 506/2 One eye was centred on a projection perimeter (the other eye was always covered with a plasticine occluder).

2000 Binocular Vision & Strabismus Q. 15 59 In humans, pathologic misalignment of the eyes (strabismus, or hetero-tropia) is readily detected using a clinical technique in which the visual axis of each eye is blocked briefly by a hand held occluder.