CHAIN

A series of things depending on each other as if linked together

Example: "The chain of command"

British biochemist (born in germany) who isolated and purified penicillin, which had been discovered in 1928 by sir alexander fleming (1906-1979)

(chemistry) a series of linked atoms (generally in an organic molecule)

A series of (usually metal) rings or links fitted into one another to make a flexible ligament

(business) a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership

Anything that acts as a restraint

A unit of length

A series of hills or mountains

Example: "The valley was between two ranges of hills"

A linked or connected series of objects

Example: "A chain of daisies"

A necklace made by stringing objects together

Example: "A string of beads"