Glossary

182 terms beginning with P · showing 161–182

1. promiscuous

   Not selective, especially used in reference to sexual behaviour. Sometimes used in reference to the reproductive behaviour of certain fishes.

2. proscapula

   See cleithrum.

3. protandrous

   Exhibiting protandry.

4. protandry

   Form of sequential hermaphroditism in which male offspring become female at some point during their life cycle.

5. protein skimmer

   Mechanical device used to remove organic compounds in marine aquaria via the process of foam fractionation.

   Used in 1 profile

6. protogynous

   Exhibiting protogyny.

7. protogyny

   Form of sequential hermaphroditism in which female offspring become male at some point during their life cycle.

8. protozoa

   Plural of protozoan.

9. protozoan

   Any member of a diverse group of unicellular eukaryotic organisms including amoebas, ciliates, flagellates, and sporozoans. Also spelled protozoon.

10. protozoon

    See protozoan.

11. protractile

    Capable of being protracted; extensible.

12. protrusible

    Capable of being extended or thrust forwards. Often used in reference to the jaws of certain fishes.

    Used in 13 profiles

13. proximal

    Located close to or towards the point or origin of attachment or a central point of the body. Opposite of distal.

    Used in 60 profiles

14. pseudobranch

    Accessory or spurious gill, often located on the inner surface of the operculum in various fishes, that is usually small and sometimes completely obscured beneath the epithelium. Also referred to as pseudobranchia.

15. pseudotympanum

    Translucent, triangular area in the humeral region, behind the opercle, without muscle and where the anterior part of the gas bladder is in direct contact with the skin. It is hypothesised to function as a hearing aid in many juvenile characoids and is present in adults of certain species, notably members of the family Cheirodontidae.

    Used in 2 profiles

16. pterygiophore

    Bony or cartilaginous structures via which the rays of the median fins articulate and connect to the body.

    Used in 31 profiles

17. pterygoid bone

    Paired bone in the roof of the mouth connecting the palatine anteriorly to the quadrate posteriorly.

18. punctate

    Having or marked with small spots, depressions, or holes.

19. pustulated

    Having or covered with pustules.

20. pustule

    Small, raised spot resembling a blister or pimple.

21. pylorus

    Passage connecting the stomach with the intestine.

22. pyriform

    Pear-shaped.

    Used in 11 profiles