osmoticumn.

Brit.

/ɒzˈmɒtᵻkəm/, U.S.

/ɑzˈmɑdək(ə)m/

Inflections: Plural osmotica, (rare) osmoticums.

Origin: A variant or alteration of another lexical item. Etymon: osmotic adj.

Etymology: < osmotic adj. + -um, after Latin nouns in -um.

Plant Physiology.

A substance which plays a significant role in increasing or maintaining osmotic pressure, esp. within cells.

ΚΠ

1961 Amer. Jrnl. Bot. 48 917 One must assume that..other ions present in much lower concentration are then accumulated to produce the higher OP's or that nonelectrolytes provide the extra osmotica.

1982 J. B. Harborne Introd. Ecol. Biochem. (ed. 2) i. 22 The relative cost to the plant in terms of nutrient and energy supply of these different osmotica undoubtedly varies.

1995 FEBS Lett. 362 180 Apoplastic sucrose is apparently a source of guard-cell nutrition and, possibly, osmoticum.

This is a new entry (OED Third Edition, September 2004; most recently modified version published online March 2022).

单词	osmoticum
释义	osmoticumn. Brit. /ɒzˈmɒtᵻkəm/, U.S. /ɑzˈmɑdək(ə)m/ Inflections: Plural osmotica, (rare) osmoticums. Origin: A variant or alteration of another lexical item. Etymon: osmotic adj. Etymology: < osmotic adj. + -um, after Latin nouns in -um. Plant Physiology. A substance which plays a significant role in increasing or maintaining osmotic pressure, esp. within cells. ΚΠ 1961 Amer. Jrnl. Bot. 48 917 One must assume that..other ions present in much lower concentration are then accumulated to produce the higher OP's or that nonelectrolytes provide the extra osmotica. 1982 J. B. Harborne Introd. Ecol. Biochem. (ed. 2) i. 22 The relative cost to the plant in terms of nutrient and energy supply of these different osmotica undoubtedly varies. 1995 FEBS Lett. 362 180 Apoplastic sucrose is apparently a source of guard-cell nutrition and, possibly, osmoticum. This is a new entry (OED Third Edition, September 2004; most recently modified version published online March 2022). < n.1961
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