chirp 
(chûrp)
(chûrp)n.
A short, high-pitched sound, such as the one a small bird or insect makes.
intr.v. chirped, chirp·ing, chirps
To make a short, high-pitched sound.
[Middle English *chirpen, of imitative origin.]
- polychromatophilic
- polychrome
- polychromic
- polychromophilia
- polychromous
- polychromy
- Polycleitus
- polyclinic
- Polyclitus
- polyclonal
- polyclonally
- polyconic projection
- polycyclic
- polycyclic aromatic hydrocarbon
- polycystic
- polycystic ovary syndrome
- polycythemia
- polydactyl
- polydactylism
- polydactyly
- polydentate
- polydipsia
- polydipsic
- polyelectrolyte
- polyembryonic