asterism
UK[ˈæstərɪzəm]US[ˈæstəˌrɪzəm]
n
A prominent pattern or group of stars, smaller than a constellation, that is popularly recognized in the night sky.
n
A group of three asterisks (⁂) used in printing to draw attention to a passage or to indicate a break in thought.
Morpheme Breakdown
aster
ism
aster
star
ism
system, condition
Etymology
The word 'asterism' is a direct borrowing from the Greek 'asterismos,' which itself derives from 'astēr,' meaning "star." The Greek suffix '-ismos' was used to form nouns indicating a state or system. Thus, the term's literal construction points to "a condition or grouping pertaining to stars." This logic perfectly maps to its primary astronomical meaning: a recognized pattern of stars. The typographical meaning, referring to a cluster of asterisk symbols (⁂), is a later metaphorical extension from the 18th century, where the printed symbol () is literally called a "little star" (from Greek 'asteriskos'), and a group of them forms a figurative stellar pattern.
Analysis
Structure: aster (star) + ism (system, condition)
aster: From Greek 'astēr' (star). Functions as the root, providing the core semantic element of "star."
ism: From Greek '-ismos,' a suffix forming nouns of action, state, or condition. In this word, it denotes a system or grouping related to the root.
Examples
The Big Dipper is not a constellation but an asterism within the larger constellation Ursa Major.
The author used an asterism to mark a transition between the two major sections of the chapter.
Orion's Belt is one of the most famous and easily identifiable asterisms in the winter sky.