lacus
Also found in: Medical.(redirected from Lacus lacrimalis)
lacus
(lah -kŭs) A small relatively smooth dark isolated area. The word is used in the approved name of such a surface feature on the Moon and, now unofficially, on Mars. (Latin: lake)Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive
Epiphora was diagnosed based on any one of the following features--a history of watering and discharge for more than 4 weeks, presence of
lacus lacrimalis, raised tear meniscus, discharge and regurgitation on pressure.
The negative pressure sucks in the tears which are located in the
lacus lacrimalis. (1) The tears then enter the nasal cavity, just lateral to the inferior nasal turbinate.
Once an eyelash is shed into the external ocular surface, it can cause foreign body sensation, leading to reflex tearing that will carry it away to the
lacus lacrimalis. At this point, it comes in close contact with the punctum and can be propelled by the lids or sucked into the canaliculus in the blink cycle.
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