focal
UK /ˈfəʊ.kl̩/ · US /ˈfoʊ.kl̩/ adjective, noun
Forms focals
- adjective Belonging to, concerning, or located at a focus (definite location). “focal point”
- adjective Belonging to, concerning, or located at a focus of attention. “focal point”
- adjective (medicine) Limited to a small area. “The rash was focal.”
- noun (geometry, obsolete) One of two lines perpendicular to the axis of a cone such that the cosine of the angle between the line and the axis is equal to the ratio of the cosines o the semiangles of the cone.
- noun (Wicca) An object that is used to focus concentration when performing magic.
- noun The individual who is the focus of a study or review, when the study or review is based on that individual's interactions with others.
- noun A representative of a group or class of people within an organizational system.
- noun A sign or similar type of marketing material designed to draw attention to special deals.
- noun The central or most important element of something; a focal element.
- noun A major point of interest; an attraction.
- noun An exemplar of a concept.
Antonyms
Etymology
Learned borrowing from New Latin focālis. By surface analysis, focus + -al.
Webster’s 1913
- adjective Belonging to,or concerning, a focus; as, a focal point. Focal distance, or length,of a lens or mirror (Opt.), the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center. --Focal distance of a telescope, the distance of the image of an object from the object glass.
Etymology [Cf.F. focal. See Focus.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “focal”, CC BY-SA 4.0. Details