-ac (Greek > Latin: a suffix; related to, of the nature of, pertaining to).A suffix that forms adjectives. The suffix -ic has related elements.ambrosiac, Greek and Roman Mythology: 
The food of the gods, thought to confer immortality; now, a dessert consisting primarily of oranges and flaked coconut.
 
ammoniac: 
amnesiac: 
Partial or total loss of memory.
 
anaphrodisiac: 
anthomaniac: 
antidemoniac: 
aphorodisiac: 
cardiac: 
Near or relating to the heart.
 
celiac: 
demoniac: 
elegiac: 
haemophiliac: 
heliac: 
hemophiliac: 
hypochondriac: 
iliac: 
insomniac: 
Chronic inability to fall asleep or to remain asleep for an adequate length of time.
 
maniac: 
melancholiac: 
phobiac: 
prosodiac: 
pulmoniac: 
pyromaniac: 
An uncontrollable impulse to start fires.
 
sacroiliac: 
symposiac: 
A convivial meeting for drinking, music, and intellectual discussion among the ancient Greeks; now, a meeting or conference for the discussion of a topic or special subject.
 
zodiac: 
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