Inliers

Part of speech: noun

Definitions

1. Points in a data set that conform to the general trend or model being analyzed
2. Observations that lie within the acceptable bounds or normal variation in a data collection
3. Elements of a set that fit the typical pattern and are not considered outliers or anomalies

Etymology: "Inliers" is the plural of "inlier," a noun meaning a rock formation or body of older material surrounded by younger rock, and in statistics and data science, a data point that sits within the main cluster rather than far from it. The word is built from the English preposition "in" and the agent suffix "-lier," which turns a phrase or verb into a noun for someone or something that does a particular thing. The construction is transparent: an inlier is something that lies in, sitting inside a larger surrounding body.