See also:

• FOCUS (Latin for " hearth " or " fireplace ")

FOCUS (Latin for " See also:

• HEARTH (a word which appears in various forms in several Teutonic languages, cf. Dutch haard, German Herd, in the sense of " floor ")

hearth " or " fireplace ")  , a point at which converging rays meet, toward which they are directed, or from which diverging rays are directed; in the latter See also:

• CASE
• CASE, JOHN (d. 1600)

case called the virtual See also:

• FOCUS (Latin for " hearth " or " fireplace ")

focus (see See also:

• MICROSCOPE (Gr. µucp6s, small, asenreiv, to %view)

MICROSCOPE; See also:

• TELESCOPE

TELESCOPE; See also:

• LENS
• LENS (from Lat. lens, lentil, on account of the similarity of the form of a lens to that of a lentil seed)

LENS) . In See also:

• GEOMETRY

geometry the word is used to denote certain points (see GEOMETRY; CONIC See also:

• SECTION
• SECTION (Lat. sectio, cutting, secare, to cut)

SECTION; and See also:

• PERSPECTIVE (Lat. peespicere, to see through)

PERSPECTIVE) .