malaco-, malac-, malako-, -malacia +

(Greek: soft, softness; abnormal softening, soft-bodied)

malacosis
Malacia.
malacosomous
Characterized by a soft body.
malacostean
Osteomalacia.
malacostomous
A reference to fish that have a soft mouth (i.e. toothless jaws); leather-mouthed.
malacotic
Inclined to malacia; soft; said of teeth.
malacotomist
One who is versed in malacotomy.
malacotomy, malacotomic
1. A surgical incision into soft tissue, such as the anterior abdominal wall.
2. The anatomy of soft-bodied animals, e.g. the Mollusca.
malacozoic (adjective) (not comparable)
Pertaining to the Malacozoa or soft-bodied animals: Molacozoic organisms form an extensive group of invertebrates consisting of the Bryozoa, Mollusca, and Brachiopoda. e.g. the Mollusca.

The Mollusca is Huxley's term for the series of animals from the lowest Polyzoa to the highest molluscs.

malacozoology (s) (noun) (no pl)
The study of molluscs: Malacozoology is the science of soft-bodied invertebrate animals, normally with a hard shell consisting of one or more parts.
malactic
1. Softening; emollient.
2. An emollient [softening or soothing] medicine.
metromalacia
Obsolete term for pathologic softening of the uterine tissues.
myelomalacia
Softening of the spinal cord.
myomalacia
Pathologic softening of muscular tissue.
nephromalacia
Softening of the kidneys.
neuromalacia
Pathologic softening of nervous tissue.