June 4, 2012
Saturnine

sat·ur·nine (sat-er-nine | sætərnaɪn)
late Middle English, from Medieval Latin 

adjective
reserved, reluctant, sluggish

His saturnine disposition makes him a very relaxing pet to keep around.

January 15, 2012
cockatrice

cock·a·trice (kok-uh-tris | kɒkətrɪs)
Middle English, from Middle French, from Medieval Latin 

noun
a legendary monster with a deadly glance, supposedly hatched by a serpent from the egg of a cock, and commonly represented with the head, legs, and wings of a cock and the body and tail of a serpent

He gave me a poisonous stare comparable to that of a cockatrice. 

Submitted by deadstillcurious

October 15, 2011
apocryphal

a·poc·ry·phal ( uh-poc-ruff-ull | əpɒkrəfəl )
Medieval Latin 

adjective
dubious, of doubtful authenticity

All of these claims are wildly apocryphal. 

August 23, 2011
diaphanous

di·aph·a·nous (dahy-af-uh-nuhs | daɪˈæfənəs)
Medieval Latin < Greek

adjective
1) very sheer and light; almost completely transparent or transluscent
2) delicately hazy

A diaphanous mist settled on the city in the early hours of the morning.

(Source: dictionary.reference.com)

August 22, 2011
preternatural

pre·ter·nat·u·ral (pree-ter-nach-er-uhl, -nach-ruhl | ˌpritərˈnætʃərəl,-ˈnætʃrəl)
Medieval Latin

adjective
1) out of the ordinary course of nature; exceptional or abnormal
2) outside of nature; supernatural

Chas started buying real estate in his early teens and seemed to have an almost preternatural understanding of international finance.

Example taken from http://sentence.yourdictionary.com/preternatural.

(Source: dictionary.reference.com)

August 22, 2011
predilection

pre·di·lec·tion   (pred-l-ek-shuhn, preed |ˌprɛdlˈɛkʃən,ˌprid)
French/Medieval Latin

noun
a tendency to think favorably of something in particular; partiality; preference:

a predilection for Bach

Submitted by captainthermostat.

August 18, 2011
zenith

ze·nith (zee-nith or, especially British, zen-ith | zɛnɪθ)
Middle English < Medieval Latin < Old Spanish < Arabic

noun
1) the point on the celestial sphere vertically above a given position or observer
2) a highest point or state; culmination

Just when Frieza thought his enemy’s power had reached its zenith, Goku turned super saiyan in the middle of the battle for Namek. 

(Source: dictionary.reference.com)

August 17, 2011
quintessential

quin·tes·sen·tial (kwin-tuh-sen-shuhl | ˌkwɪntəˈsɛnʃəl)
Middle English < Medieval Latin 

adjective
1) of the pure and essential essence of something
2) of or pertaining to the most perfect embodiment of something

Many consider Charles Dickens the quintessential Victorian author.

Submitted by ryanewolf

(Source: dictionary.reference.com)