Term: active transport: transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy
Broader: physical entity: an entity that has physical existence | Unrelated: filler: the tobacco used to form the core of a cigar
Broader: physical entity: an entity that has physical existence | Unrelated: array: an impressive display
Broader: physical entity: an entity that has physical existence | Unrelated: union: the occurrence of a uniting of separate parts
Broader: physical entity: an entity that has physical existence | Unrelated: tack: the heading or position of a vessel relative to the trim of its sails
Broader: physical entity: an entity that has physical existence | Unrelated: merluccius: hakes
Broader: physical entity: an entity that has physical existence | Unrelated: california black oak: large deciduous tree of the Pacific coast having deeply parted bristle-tipped leaves
Broader: physical entity: an entity that has physical existence | Unrelated: eclipse: one celestial body obscures another
Broader: physical entity: an entity that has physical existence | Unrelated: electronic instrument: a musical instrument that generates sounds electronically
Broader: physical entity: an entity that has physical existence | Unrelated: degree: the highest power of a term or variable
Broader: physical entity: an entity that has physical existence | Unrelated: water strider: long-legged bug that skims about on the surface of water