dǎo​guǎn

botanical vessel

导管 (導管) dǎo​guǎn
botanical vessel noun
a tube-like structure in the xylem of plants used for transporting water and minerals

Water is transported upward from the roots through the plant's vessels.

catheter noun
a flexible tube inserted into the body for withdrawing or introducing fluids

The doctor inserted a catheter into the patient's bladder after surgery.

duct noun
a pipe, tube, or conduit used for conveying fluids or protecting wires

These wires are all housed in metal conduits.

Frequency

Movie subtitles
2.62 per million appears in 1% of films
Written text
7.13 per million

Sources

Definitions
CC-CEDICT