companion cell
Botany
noun
(In the phloem of flowering plants) a specialized elongated cell, one or more of which is typically connected to, and regulates the movement of substances into and out of, each sieve cell; (in early use also) †a cell that has recently divided from another (obsolete ).
Origin
Mid 19th century. In later use after German Geleitzelle.
- marsh frog
- marsh gas
- marsh gentian
- marsh grass
- marsh harrier
- marsh hawk
- marsh hay
- marsh helleborine
- marsh hen
- marsh horsetail
- marshiness
- marshing
- marshland
- marshlander
- marsh-light
- marsh lousewort
- marshmallow
- marsh mallow
- marshmallow roast
- marshmallowy
- marshman
- marsh marigold
- marsh melon
- marsh mutton
- marsh orchid