That's precious
Math folk
"I" loves "U"
TV Sitcom By Episode
The animal "in the" metaphor
100

The 1901 work "Yo Picasso" once sold for $47.9 mil.; if you know what "yo" means in Spanish, you know it's this kind of painting

self-portrait

100

A theorem about right triangles bears the name of this ancient Greek, once also regarded as the father of vegetarianism

Pythagoras

100

This astrological sign is thought to be Ganymede, who was abducted by an eagle & became an Olympian cupbearer

Aquarius

100

"The Puffy Shirt" &
"The Summer of George"

Seinfeld

100

To be frozen in fear is to be "caught like" this unfortunate creature, glare or no glare

deer in the headlights

200

Caviar from Huso huso, this species of sturgeon, can go for nearly $1,000 an ounce

beluga

200

This French mathematician devised the system of coordinates used for, among other things, playing "Battleship"

Descartes

200

When one of these opened in a museum in the 1920s, it was described as "a schoolroom under the vault of heaven"

planetarium

200

"A Hard Jay's Night" &
"Phil on Wire"

Modern Family

200

There's a small wild canine in this term for a treacherous infiltrator

fox in the henhouse

300

"I shoot the hippopotamus with bullets made of" this / "Because if I use leaden ones his hide is sure to flatten 'em"

platinum

300

In the 18th c. Leonhard Euler popularized "Latin Squares", forerunners of the puzzles that got this name in 1984

sudoku

300

Loosely meaning a "party of 3", it describes the situationship of 3 Romans who were more frenemies than besties

triumvirate

300

"Hostage Situation" &
"Captain Peralta"

Brooklyn 99

300

This 11-word phrase means it's better to have a sure thing than to risk it for double

A bird in the hand is the worth two in the bush

400

This word originally referred to the mold from which a bar of metal like gold is cast; now it primarily means the bar itself

ingot
400

This father of computing also compiled the first reliable actuarial tables & was famous for his Saturday night parties

Charles Babbage

400

The Schatzalp is the only one of these treatment centers mentioned by its real name in "The Magic Mountain"

sanitarium

400

"Joanie's First Kiss" &
"Richie Almost Dies"

Happy Days

400

The Latin phrase latet anguis in herba is the source of this phrase for a pretended friend or lurking danger

snake in the grass

500

One estimate says it costs $25 billion to make a gram of this stuff at CERN--& that's just for the cheaper positrons

antimatter

500

Known for his "Last Theorem", this father of differential calculus was a lawyer by day; math was just a hobby

Fermat

500

These drugs that might make you feel the motion of the ocean in your bladder are also known as "water pills"

diuretics

500

"And the Big Buttercream Breakthrough" &
"And the Taste Test"

2 Broke Girls
500

A person who has no use for something but selfishly prevents others from enjoying it is one of these

dog in the manger

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