penicillus
/ˌpɛnɪˈsɪləs/noun
1 Anatomy. A tuft of small blood vessels, (in later use) specifically of arterioles in the spleen.
2 Mycology and Botany. A structure resembling a paintbrush; specifically the conidium-producing body of a fungus of the genus Penicillium and related genera.
Origin
Late 16th century (in an earlier sense). From classical Latin pēnicillus pencil.
- keep one's distance
- keep one's eye on (or take one's eye off) the ball
- keep one's eyes open (or peeled or skinned)
- keep one's feet
- keep one's fingers crossed
- keep one's hands clean
- keep one's head
- keep one's head above water
- keep one's head down
- keep one's mouth shut
- keep one's nose clean
- keep one's nose out of
- keep one's nose to the grindstone
- keep one's own counsel
- keep one's powder dry
- keep one's side of the bargain
- keep one's word
- keep (or archaic bear) someone company
- keep (or eat) kosher
- keep (or hold) one's end up
- keep (or leave) one's options open
- keep (or lose) one's cool
- keep (or lose) one's temper
- keep (or lose) track of
- keep (or make) a House