protoxylem
Botany
noun
The first-formed elements of the primary xylem in a plant organ, maturing before elongation of the surrounding plant tissue is complete and therefore often subsequently distorted or destroyed by this process.
Origin
Late 19th century. After German Protoxylem.
- uptight
- uptime
- up to
- up to a point
- up to date
- up to eleven
- up to mud
- up to no good
- up to one's armpits
- up to one's ears in
- up to one's elbows in
- up to one's neck in
- up to one's (old) tricks
- up top
- up to par
- up to putty
- up to scratch
- up to snuff
- up to speed
- (up) to the hilt
- up to the mark
- up to the minute
- up to the (or one's) eyeballs
- up to the (or one's) eyes (in)
- uptown