"During the period of their formation these ideas, which in the nineteenth century came to be known as liberalism, were not yet described by that name. The adjective 'liberal' gradually assumed its political connotation during the later part of the eighteenth century when it was used in such occasional phrases as when Adam Smith wrote of 'the liberal plan of equality, liberty, and justice'. As the name of a political movement liberalism appears, however, only at the beginning of the next century, first when in 1812 it was used by the Spanish party of Liberales, and a little later when it was adopted as a party name in France. In Britain it came to be so used only after the Whigs and the Radicals joined in a single party which from the early 1840s came to be known as the Liberal Party. Since the radicals were inspired largely by what we have described as the Continental tradition, even the English Liberal Party at the time of its greatest influence was based on a fusion of the two traditions mentioned.In view of these facts it would be misleading to claim the term 'liberal' exclusively for either of the two distinct traditions. They have occasionally been referred to as the 'English', 'classical' or 'evolutionary', and as the 'Continental' or 'constructivistic' types respectively. In the following historical survey both types will be considered, but as only the first has developed a definite political doctrine, the later systematic exposition will have to concentrate on it."
https://en.wikiquote.org/wiki/New_Studies_in_Philosophy%2C_Politics%2C_Economics_and_the_History_of_Ideas