Dictionary.net

Specifically , an animal or plant departing greatly from the usual type, as by having too many limbs.

Any thing or person of unnatural or excessive ugliness, deformity, wickedness, or cruelty.

Monstrous in size.

To make monstrous.

Specifically , an animal or plant departing greatly from the usual type, as by having too many limbs.

Any thing or person of unnatural or excessive ugliness, deformity, wickedness, or cruelty.

Monstrous in size.

To make monstrous.

A fetus or infant with such pronounced developmental anomalies as to be grotesque and usually nonviable. (Dorland, 27th ed)

Any animal or thing out of the usual course of nature; something very huge or remarkably deformed or hideous; a person remarkable for extreme wickedness, cruelty, etc.

A malformed fetus.

Fetal malformation.

Anything out of the usual course of nature: a prodigy: anything horrible from ugliness or wickedness.

A prodigy; anything frightful and unnatural; atrocious criminal.

Anything hideous or abnormal; one atrociously wicked or cruel.

A very large person or thing.

An unnatural production; something greatly deformed; a person unnaturally wicked or vicious.

Anything out of the common order of nature; a creature with parts not natural; a person looked upon with horror on account of extraordinary crimes, or of deformity, or power to do harm; anything uncommonly large.

Any organized being, having an extraordinary vice of conformation, or a preternatural perversion of every part, or of certain parts only.

Fetus malformed, or with an excess or deficiency of parts.

n. [Latin] Something of unnatural size, shape, or quality, a prodigy; an enormity; -an animal or plant of abnormal birth of growth; -ugly or horrible object; deformity; -a person of unnatural wickedness, cruelty, and the like.