The Probert Encyclopaedia of Heraldry

ICICLE

In heraldry, an icicle is a charge like a drop or goutte reversed.
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IMPALE

In heraldry impale means to join, as two coats of arms on one shield, palewise; hence, to join in honorable mention.
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IMPALEMENT

In heraldry, impalement is the division of a shield palewise, or by a vertical line, especially for the purpose of marshalling or putting side-by-side (impaling) the arms of husband and wife (see Arms of Alliance).
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IMPRESA

In heraldry, an impresa is a device on a shield or seal, or used as a bookplate or the like.
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INCENSANT

In heraldry the term incensant describes an animals when borne as raging, or with furious aspect.
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INCENSED

In heraldry the term incensed describes a wild animal represented as enraged, for example an animal depicted with fire issuing from its mouth and eyes.
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INCLAVE

In heraldry, inclave means resembling a series of dovetails. The term is applied to a line of division, such as the border of an ordinary.
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INCRESCENT

In heraldry the term increscent is applied to a depiction of the moon represented as the new moon, with the points turned toward the dexter side.
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INDENTED

In heraldry, indented refers to notched like the teeth of a saw, but smaller than dancette. The term is applied to one of the lines of partition; ordinaries are also borne indented.
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INESCUTCHEON

In heraldry, an inescutcheon is a small escutcheon borne within a shield.
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INTERCHANGEABLY POSED

In heraldry, interchangeably posed describes bearings placed or lying across each other, as three fish, three swords, three arrows &c. the head of each appearing between the tails, hilts, or rear-ends of the others.
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INTERFRETTED

In heraldry, interfretted means interlaced. The term is applied to any bearings linked together, one within the other, as keys interlaced in the bows, or one linked into the other.
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INVECTED

In heraldry, the term invected means having a border or outline composed of semicircles with the convexity outward - the opposite of engrailed.
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ISSUANT

In heraldry, issuant means issuing or coming up and is used to describe a charge or bearing rising or coming out of another.
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