As nouns the difference between periherm and periderm
is that periherm is (astronomy) in an orbit around the planet mercury, the point that is closest to mercury while periderm is (botany) the outer layer of plant tissue; the outer bark.
periherm
English
Noun
(
en noun)
(astronomy) In an orbit around the planet Mercury, the point that is closest to Mercury.
Antonyms
* (a point in an orbit around the planet Mercury) apoherm
References
*BepiColombo Mission
See also
* periapsis
* perihelion
* perigee periderm
English
Noun
(
en noun)
(botany) The outer layer of plant tissue; the outer bark.
(zoology) The perisarc; the hard outer layer of hydroids and other marine animals.
References
*