separatrix

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|typography|historical}} The ⟨'''L'''⟩ or [[pipe]] ⟨'''{{!}}'''⟩ [[mark]] formerly used to divide [[integer]]s from [[decimal]]s.
2. {{lb|en|typography|obsolete}} {{synonym of|en|decimal point}}, which replaced such marks.
3. {{lb|en|typography}} The [[proofreader]]'s mark resembling a [[slash]] {{nowrap|⟨ '''[[/]]''' ⟩}} or [[vertical bar]] {{nowrap|⟨ '''{{!}}''' ⟩}} placed after a note in the [[margin]] to indicate that it should replace the item(s) [[struckthrough]] in the [[running text]] or to separate it from other margin notes.
4. A [[terminator]]: a [[line]] on a partially-[[illuminated]] surface separating the [[lit]] and [[shaded]] regions.
5. {{lb|en|physics}} The line between [[region]]s having different [[magnetic field]]s.
6. {{lb|en|mathematics}} The [[boundary]] separating two [[mode]]s of [[behavior]] in a [[differential equation]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.