glacis (en)

a bank sloping down from a fort which exposes attackers to the defenders' missiles

glissando (en)

(noun) a rapid sliding up or down the musical scale

gneiss (en)

(noun) a foliated metamorphic rock corresponding in composition to a feldspathic plutonic rock (as granite)

gnosis (en)

(noun) esoteric knowledge of spiritual truth held by the ancient Gnostics to be essential to salvation

gofer (en)

(noun) an employee whose duties include running errands; lackey

Gorgon (en)

(noun) any of three snake-haired sisters in Greek mythology whose appearance turns the beholder to stone / (noun) an ugly or repulsive woman

gorse (en)

(noun) a spiny yellow-flowered European shrub (Ulex europaeus) of the legume family / (noun) any of several related plants (genera Ulex and Genista)

Gosplan (en)

The State Planning Committee (Gosplan) was the agency responsible for central economic planning (particularly five-year plans) in the Soviet Union

gossamer (en)

(noun) a film of cobwebs floating in air in calm clear weather / (noun) something light, delicate, or insubstantial / (adjective) extremely light, delicate, or tenuous

Gothamite (en)

a journalistic nickname for New York City OR an English village, proverbial for the foolishness of its inhabitants.

goyist (en)

derived from goy (Hebrew for nation); used as a superlative for Jewishness?

gravid (en)

(adjective) pregnant / (adjective) distended with or full of eggs

greaves (en)

a piece of armour that protects the leg

guano (en)

the excrement of seabirds and bats, used as fertilizer

guignol (en)

(noun) dramatic entertainment featuring the gruesome or horrible

gussy (en)

(verb) make more attractive, especially in a showy or gimmicky way

hainamoration (en)

the ambivalence of love and hatred (a Lacanian concept)

halation (en)

(noun) the spreading of light beyond its proper boundaries in a developed photographic image / (noun) a bright ring that sometimes surrounds a bright object on a television screen

harelipped (en)

(pejorative, often metaphorical) having a cleft lip

harrow (en)

(noun) a cultivating implement set with spikes, spring teeth, or disks and used primarily for pulverizing and smoothing the soil / (verb) to cultivate with a harrow / (verb) torment, vex; pillage, plunder

haruspicy (en)

the art or practice of divination (ancient Rome)

Hays code (en)

aka Motion Picture Production Code; the set of industry moral guidelines that was applied to most US films from 1930 to 1968 (think profanity, drugs, sedition, miscegenation, etc)

hebetude (en)

(noun) lethargy dullness

hedonic price index (en)

any price index which uses information from hedonic regression, which describes how product price could be explained by the product's characteristics (e.g., improvements in quality)

hegemonic re-education (en)

related to "cultural hegemony" in Marxist philosophy (when the ruling class imposes their own worldview on the culture of a society)