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precava

[pree-key-vuh, -kah-]

noun, plural pre·ca·vae

[-key-vee, -kah-vahy] .

See under vena cava.

(in squids) either of a pair of veins that pass through the kidney to the branchial heart.

Origin:
1865–70; pre- + (vena) cava

Related forms

pre·ca·val, adjective

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Precava is always a great word to know.

So is ninnyhammer. Does it mean:

a fool or simpleton; ninny.

a gadget; dingus; thingumbob.

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Dictionary.com Unabridged

noun, plural ve·nae ca·vae

[vee-nee key-vee] . Anatomy.

either of two large veins discharging blood into the right atrium of the heart, one (superior vena cava or precava) conveying blood from the head, chest, and upper extremities and the other (inferior vena cava or postcava) conveying blood from all parts below the diaphragm.

Origin:
1590–1600; < Latin vēna cava hollow vein

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Medical Dictionary

precava pre·ca·va (prē-kā'və, -kä'-)
n. pl pre·ca·vae (-vē)
See superior vena cava.

pre·ca'val adj.