What's the difference between cetene and spermaceti?

Cetene

Definition:

(n.) An oily hydrocarbon, C16H32, of the ethylene series, obtained from spermaceti.

Example Sentences:

Definition:

(n.) A white waxy substance obtained from cavities in the head of the sperm whale, and used making candles, oilments, cosmetics, etc. It consists essentially of ethereal salts of palmitic acid with ethal and other hydrocarbon bases. The substance of spermaceti after the removal of certain impurities is sometimes called cetin.

Example Sentences:

(1) A repository dosage form was devised that consisted of an s.c. implant of pyridoxal phosphate suspended in a spermaceti and peanut oil mixture.
(2) The complex represents the most important factor in the morphogenesis and growth of the characteristic big forehead in Physeter, which contains the spermaceti organ unique within the odontocetes.
(3) In examining further, methadone hydrochloride suspensions were developed using spermaceti or eudragit retard-1 for particle coating.
(4) Nevertheless, these differences have to be taken as specializations related to the development of the far-advanced spermaceti organ.
(5) When I opened it, I found block after block of solid, pure, spermaceti wax , the solidified oil from the sperm whale’s head.
(6) So fine is spermaceti oil that Nasa used it in their space mission, as it does not freeze in outer space.