British biochemist (born in Germany) who isolated and purified penicillin, which had been discovered in 1928 by Sir Alexander Fleming (1906-1979)
a unit of length
a series of (usually metal) rings or links fitted into one another to make a flexible ligament
a necklace made by a stringing objects together; "a string of beads"; "a strand of pearls";
anything that acts as a restraint
a linked or connected series of objects; "a chain of daisies"
(business) a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership
a series of things depending on each other as if linked together; "the chain of command"; "a complicated concatenation of circumstances"
(chemistry) a series of linked atoms (generally in an organic molecule)
fasten or secure with chains; "Chain the chairs together"
a series of hills or mountains; "the valley was between two ranges
neckwear worn in a slipknot with long ends overlapping vertically in front
neckwear consisting of a long narrow piece of material worn (mostly by men) under a collar and tied in knot at the front; "he stood in front of the mirror tightening his necktie"; "he wore a vest and tie"
fasten or secure with a rope, string, or cord; "They tied their victim to the chair"
a cord (or string or ribbon or wire etc.) with which something is tied; "he needed a tie for the packages"
connect, fasten, or put together two or more pieces; "Can you connect the two loudspeakers?"; "Tie the ropes together"; "Link arms"
a horizontal beam used to prevent two other structural members from spreading apart or separating; "he nailed the rafters together with a tie beam"
unite musical notes by a tie
one of the cross braces that support the rails on a railway track; "the British call a railroad tie a sleeper"
make by tying pieces together; "The fishermen tied their flies"