[ noun ] bottle that has a narrow neck
Used in print(Francis J. Johnston and John E. Willard, "The...)
The silver_chloride was fused under vacuum in the presence of aluminum chips with the resultant product of * * f which was sublimed into a flask on the vacuum line .
Purified inactive chlorine was then added from one of the tubes described above and the mixture frozen_out and sealed_off in a flask equipped with a break_seal .
This chlorine carbon_tetrachloride solution was illuminated for a day following which the flask was resealed onto a vacuum system and the excess chlorine distilled off .(M. Yokoyama et al., "Chemical and serological...)
the other , a shallow concave gradient ( Fig. 1 ) , was produced with a so-called `` cone sphere '' apparatus , the `` cone '' being a 2 - liter Erlenmeyer_flask and the `` sphere , '' a 2 - liter round-bottom flask .