(often humorous) Even if a person is in his or her senior years, with gray hair, he or she can still have ambition and energy, especially sexual energy.

(organic chemistry) Denotes the presence of four carbon atoms in the parent chain when forming names of organic compounds.

A block copolymer consisting of two polystyrene chains, one each side of a polybutadiene sequence; they have both thermoset and thermoplastic properties.

For success, and especially to obtain employment, one's knowledge and skills are less useful and less important than one's network of personal contacts.

plural of butadiyne

(idiomatic) then again, on the other hand; used to show that the opposite viewpoint is possible.

(idiomatic) Almost everything, whether needed or not.

(organic chemistry) reaction with butadiene

(organic chemistry, especially in combination) Any substituent derived from butadiene

(organic chemistry) The allenyl carboxylic acid CH₂=C=CH-COOH