reticulum

US /rɪˈtɪk.jə.ləm/
UK /rɪˈtɪk.jə.ləm/
"reticulum" picture
1.

a fine network or reticule

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The microscope revealed a delicate reticulum of nerve fibers.
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The artist used a complex reticulum of lines to create the illusion of depth.
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networkmeshnetweblattice
2.

the second stomach of a ruminant, between the rumen and the omasum, having a honeycomb lining

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The cow's reticulum helps in the digestion of coarse feed.
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Foreign objects ingested by ruminants often get trapped in the reticulum.