Iatrochemist (n.)
definition: A physician who explained or treated diseases upon chemical principles; one who practiced iatrochemistry.

Iatrochemist is a 12 letter word that begins with an I and ends in a T

Iceland moss
definition: A kind of lichen (Cetraria Icelandica) found from the Arctic regions to the North Temperate zone. It furnishes a nutritious jelly and other forms of food
And is used in pulmonary complaints as a demulcent.
Iceland moss is a 12 letter word that begins with an I and ends in an S

Iceland spar
definition: A transparent variety of calcite
The best of which is obtained in Iceland. It is used for the prisms of the polariscope because of its strong double refraction. Cf. Calcite.
Iceland spar is a 12 letter word that begins with an I and ends in an R

Ichnographic (a.)
definition: Alt. of Ichnographical

Ichnographic is a 12 letter word that begins with an I and ends in a C

Ichnological (a.)
definition: Of or pertaining to ichnology.

Ichnological is a 12 letter word that begins with an I and ends in an L

Ichthyocolla (n.)
definition: Fish glue; isinglass; a glue prepared from the sounds of certain fishes.

Ichthyocolla is a 12 letter word that begins with an I and ends in an A

Ichthyolatry (n.)
definition: Worship of fishes
Or of fish-shaped idols.
Ichthyolatry is a 12 letter word that begins with an I and ends in a Y

Ichthyologic (a.)
definition: Alt. of Ichthyological

Ichthyologic is a 12 letter word that begins with an I and ends in a C

Ichthyomancy (n.)
definition: Divination by the heads or the entrails of fishes.

Ichthyomancy is a 12 letter word that begins with an I and ends in a Y

Ichthyopsida (n.)
definition: A grand division of the Vertebrata
Including the Amphibia and Fishes.
Ichthyopsida is a 12 letter word that begins with an I and ends in an A

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