Visual meaning of 'substituent'? - learn with images, example in daily life

Visual illustration of substituent: Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed

noun

Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed

"The chemist replaced the chlorine substituent in the molecule with a bromine substituent. "

chemistry compound substance element part

Visual illustration of substituent: (grammar) pro-form

noun

(grammar) pro-form

"In the sentence "Maria likes to read, and she likes to write," the word "she" is a substituent standing in for the noun "Maria" to avoid repetition. "

grammar linguistics language