quintessence /kwin-tesˈəns or kwinˈte-səns/

1. The pure concentrated essence of anything
2. The most essential part, form or embodiment of anything
3. A dynamical field that is repulsed by gravity and induces a vacuum energy, exerting a negative, outward pressure that is thought to cause the acceleration of the expansion of the universe (astronomy)
4. Orig a fifth entity, in addition to the four elements

quintessential /-ti-senˈshl/ adjective

• terebratulae
• terebratulas
• teredines
• teredo
• teredos
• terefa
• terefah
• terek
• tereks
• Terek sandpiper
• Terentian
• terephthalic acid
• teres
• teres major
• teres minor
• terete
• teretes
• terf
• terfe
• terfenadine
• terga
• tergal
• tergite
• tergites
• tergiversate