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4. fetus.

 

baby

pregnant

human

 

 

n. an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of

     the mature animal.

 

 

<EXAMPLE>

1. The fetus aborts during the surgery.

2. The second step is to remove the fetus.

3. The bill doesn't care the age of the fetus.

 

 

5. fauna

 

animal

species

creature

 

 

n.  1. all the animal life in a particular region or period.

     2. a living organism characterized by voluntary movement.

 

<EXAMPLE>

1. I was looking at the marine mollusk fauna.

2. The reptile fauna is in the lower alpine zone.

3. The mammal fauna of the reserve is impoverished.  

 

 

6. phosphorus.

 

 

calcium

silicon

sulfur

 

n. 1. a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks

       and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms.

    2. a planet (usually venus) seen just before sunrise in the eastern sky.

 

<EXAMPLE>

1. This was due to the use of white phosphorus.

2. They are the phosphorus analogs of carbenes and nitrenes.

3. Bone ash was he major source of phosphorus until the 1840s.